Computers & Business Machines

Apple II Personal Computer

Imagine the loss, 100 years from now, if museums hadn't begun preserving the artifacts of the computer age. The last few decades offer proof positive of why museums must collect continuously—to document technological and social transformations already underway.

The museum's collections contain mainframes, minicomputers, microcomputers, and handheld devices. Computers range from the pioneering ENIAC to microcomputers like the Altair and the Apple I. A Cray2 supercomputer is part of the collections, along with one of the towers of IBM's Deep Blue, the computer that defeated reigning champion Garry Kasparov in a chess match in 1997. Computer components and peripherals, games, software, manuals, and other documents are part of the collections. Some of the instruments of business include adding machines, calculators, typewriters, dictating machines, fax machines, cash registers, and photocopiers

Date: 1970s

Commodore Minuteman 2 Handheld Electronic Calculator

This handheld electronic calculator has a white case with black trim and metal keyboard, and an array of square black "Klixon" keys. Such keys have a design trademarked by Texas Instruments and make a distinctive click when pressed.
Description
This handheld electronic calculator has a white case with black trim and metal keyboard, and an array of square black "Klixon" keys. Such keys have a design trademarked by Texas Instruments and make a distinctive click when pressed. In addition to ten digit and one decimal point key, the calculator has four keys for arithmetic functions. One serves as a total key for addition, another as a difference key for subtraction. The top of the keyboard has a constant switch, a clear entry key, and a red clear key. The on/off switch is below the keyboard. The text next to it reads: commodore (/) Minuteman 2.
The eight-digit red LED display is behind the keyboard. A cord for recharging the battery attaches at the back of the top. (This example has no cord.)
The back has four plastic feet. A metal plate there gives operating instructions. Text near the bottom reads: COMMODORE (/) MODEL MM-2 SER. NO. R216527 (/) SANTA CLARA, CALIFORNIA (/) MADE IN U.S.A.
This was one of the first models of a handheld calculator sold by Commodore. It was manufactured by Bowmar/Ali and is similar to the Bowmar 901B.
Compare 1986.0988.099 (the Commodore Minuteman 1) and 1988.0988.129 (the Bowmar 901B).
References:
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 57.
New York Times, December 19, 1972, p. 26. Advertisement indicates that the Minuteman 2 had a regular price of $179, sale price of $92.
New York Times, February 13, 1973, p. 6. Minuteman 2 has a regular price of $179 and a sale price of $79.
Los Angeles Times, February 22, 1974, P. A2 – Commodore MM2 calculator listed as on sale for $69.95, marked down from an original price of $99.50.
Location
Currently not on view
date made
1972-1974
distributor
Commodore Business Machines, Inc.
maker
Bowmar/Ali
ID Number
1986.0988.098
catalog number
1986.0988.098
accession number
1986.0988

Casio Personal Mini Handheld Electronic Calculator

This handheld calculator reflects Casio’s long-standing attempt to bring down the price of such devices. As in the Casio Mini, the display is to the left of the keyboard.
Description
This handheld calculator reflects Casio’s long-standing attempt to bring down the price of such devices. As in the Casio Mini, the display is to the left of the keyboard. The keyboard has an array of ten digit keys, a decimal point key, a total key, and four keys for arithmetic functions that are to the right of the digit keys. Left of the digit keys are an AC (all clear) key, a clear (entry) key, and a key for shifting the display to show further digits in the result.
The on/off switch is above the six-digit vacuum fluorescent display. A mark below the display reads: CASIO personal-mini. A pin along the top edge would link to an adapter.
The back of the calculator has a compartment for two batteries. Text to the left of the compartment, stamped upside down, reads: personal-mini (/) BATTERY SUPPLY 1.5Vx2 or (/) use AC ADAPTOR AD-2S (/) .18W MADE IN JAPAN (/) BM CASIO COMPUTER CO., LTD. A sticker on the back of the compartment cover reads: 6643235. A sticker inside the compartment reads: 0503531.
The calculator fits in a black plastic sleeve. A mark on one side of the sleeve reads: CASIO. A mark on the other side reads: MADE IN JAPAN.
A March 1975 advertisement in the Washington Post describes a Casio Personal Mini very similar to this one. The advertising text indicates that the instrument took squares, powers, and reciprocals. However, the keyboards of the calculator shown and of this calculator have no special keys for these functions. The calculator sold for $19.95. Another advertisement for the Casio Personal Mini appeared in the New York Times in January of 1976. No details are given other than a price of $13.50.
References:
New York Times, January 25, 1976, p. 104.
Vintage Technology website.
Washington Post, March 23, 1975, p. A20.
Location
Currently not on view
date made
1975-1976
maker
Casio Computer Company
ID Number
1986.0988.025
catalog number
1986.0988.025
accession number
1986.0988

Bowmar MX55 Handheld Electronic Calculator

The handheld calculator has a black plastic case with ten digit keys, a decimal point key, keys for the four arithmetic functions, a total key, a percentage key, and a clear/clear entry key. The on-off switch is on the keyboard, the eight-digit display behind this.
Description
The handheld calculator has a black plastic case with ten digit keys, a decimal point key, keys for the four arithmetic functions, a total key, a percentage key, and a clear/clear entry key. The on-off switch is on the keyboard, the eight-digit display behind this. The plug for the power supply is on the right side. A mark at the top reads: Bowmar. It uses the Bowmar trademark registered in 1974.
A sticker on the back of the calculator reads in part: Bowmar MX55 PERSONAL CALCULATOR (/) WITH OMNI-CONSTANT® REGISTER. It also reads in part: BOWMAR MODEL MX55 SERIAL NO. 91220(/) BOWMAR/ALI, 531 MAIN ST., ACTON, MA. Pat. Pend. (/) ASSEMBLED IN MEXICO.
This example has no power supply, box, or instructions.
This is one of a series devices introduced by Bowmar in the early 1970s. A LED (light emitting diode) display manufacturer and defense contractor, Bowmar/Ali, Inc. (USA), found they could not sell their displays to Japanese electronic calculator makers. In 1970–71, Bowmar decided to design and manufacture portable calculators. Some were marketed by other companies, other, like this one, by Bowmar/Ali. The MX55 sold in 1974 at a list price of $69.
Compare 1986.0988.058 and 1986.0988.059.
Reference:
Guy Ball and Bruce Flamm, The Complete Collector's Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, pp. 35–37.
Location
Currently not on view
date made
ca 1974
maker
Bowmar/Ali
ID Number
1986.0988.205
catalog number
1986.0988.205
accession number
1986.0988

Bowmar MX35 Handheld Electronic Calculator

This four-function handheld electronic calculator has a black plastic case, and an array of ten digit keys and a decimal point key, all black.
Description
This four-function handheld electronic calculator has a black plastic case, and an array of ten digit keys and a decimal point key, all black. In addition, it has memory, percentage, clear/clear entry, and total keys, as well as four arithmetic function keys, all of these are blue. The on/off switch is to the right on the top row of keys. Behind the keyboard is an eight-digit LED display. A black plastic cover fits over the keyboard and display. A mark behind the display reads: Bowmar. A sticker behind this reads: MEMORY. A plug for the power supply is on the right.
The back of the calculator has a case for three AA batteries at the top. A sticker at the bottom reads: MODEL MX35 SERIAL (/) NUMBER 144885 (/) Bowmar/ ALI Inc. Acton, Mass (/) Patent Pending. A stamp on this sticker reads: ASSEMBLED (/) IN MEXICO.
Compare 1986.0988.206.
Bowmar introduced a calculator in 1971, and had successful sales in 1972 and 1973. Assembly began in Mexico in mid-1974. The company went bankrupt in February 1975 and stopped building calculators in the middle of that year. By 1976 distribution of Bowmar calculators had been taken over by Continental Microsystems.
An advertisement in the New York Times in September 1974 indicates that the Bowmar MX35 was then on sale for $54.95. An advertisement in the Chicago Tribune December 7, 1975, describes a buyout sale in which the Bowmar MX35 sold for $29.99, below the original dealer's cost of $45.50.
References:
Chicago Tribune, December 7, 1975, p. 30.
New York Times, September 17, 1974, p. 7.
Location
Currently not on view
date made
1974-1975
maker
Bowmar/Ali
ID Number
1986.0988.207
catalog number
1986.0988.207
accession number
1986.0988

Unitrex CB-8SL Handheld Electronic Calculator

This handheld electronic calculator is designed to fit into a checkbook (this example has no wallet). It has a plastic front, circuit board, and keys.
Description
This handheld electronic calculator is designed to fit into a checkbook (this example has no wallet). It has a plastic front, circuit board, and keys. The twenty-three rectangular keys include ten digit keys, a decimal point key (that can also serve as a memory exchange key), a percentage key (that can serve as a square root key), a total key, four arithmetic function keys (one of which can also serve as a squaring key and another as an inverse key), four memory keys, a clear entry/clear key, and a function/clear function key. The on/off switch is left of the three keys in the top row. There is space for six AAA batteries but no battery jack.
A sticker on the back of the calculator circuit board reads in part: UNITREX MODEL CB-8SL ELECTRONIC CALCULATOR. It also reads in part: SERIAL NO. 94456 (/) HONG KONG
Compare Unitrex CB-8SL (1986.098.161) and Novus Attache (1986.0988.227).
References:
[Advertisement], Eastern Progress, April 28, 1977, p. 8. Unitrex CB-8SL on sale for $17.99, regularly $19.99.
[Advertisement], Sedalia Democrat [Sedalia, Missouri], October 26, 1977, p. 36. Unitrex slide rule checkbook calculator selling for $9.99.
Location
Currently not on view
date made
ca 1977
maker
Eiko Business Machine Company
ID Number
1986.0988.161
catalog number
1986.0988.161
accession number
1986.0988

Commodore MM2PM Handheld Electronic Calculator

This handheld electronic calculator has a white case with black trim and metal keyboard, and an array of twenty-three oval plastic keys. In addition to ten digit keys and one decimal point key, the calculator has four keys for arithmetic functions and a total key.
Description
This handheld electronic calculator has a white case with black trim and metal keyboard, and an array of twenty-three oval plastic keys. In addition to ten digit keys and one decimal point key, the calculator has four keys for arithmetic functions and a total key. In addition there are four memory keys, a percentage key, an exchange key, and a clear key. The on/off switch is at the right on the top row of keys. Text above the keyboard reads: commodore.
The ten-digit red LED display is behind the keyboard. A cord for recharging the battery attaches at the back of the top. (This example has no cord.) The back of the case has no tag.
Unscrewing four screws in the back of the device allows one to open the case. A mark on the chip reads: LC1552B (/) 7411. This chip is associated with Western Digital.
Compare 1986.0988.100 and 1986.0988.128.
Reference:
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 58.
Location
Currently not on view
date made
1974
distributor
Commodore Business Machines, Inc.
ID Number
1986.0988.208
catalog number
1986.0988.208
accession number
1986.0988

Bowmar 90911 Handheld Electronic Calculator

This four-function handheld electronic calculator has a black plastic case and black keys. In addition to ten digit keys and a decimal point key, it has clear, total, clear entry, and four arithmetic function keys. The on/off switch is to the right on the top row of keys.
Description
This four-function handheld electronic calculator has a black plastic case and black keys. In addition to ten digit keys and a decimal point key, it has clear, total, clear entry, and four arithmetic function keys. The on/off switch is to the right on the top row of keys. Behind the keyboard is an eight-digit LED display. A black plastic cover fits over the keyboard and display. A mark behind the display reads: Bowmar. A plug for the power supply is on the right.
The back of the calculator has a compartment for three AA batteries at the top. A sticker at the bottom reads: MODEL 90911 SERIAL (/) NUMBER 178970 (/) Bowmar/ ALI Inc. Acton, Mass. 01720 U.S.A. (/) Assembled in MEXICO Patent Pending.
Compare 1986.0988.207, which has somewhat more functions but a similar design. For references on Bowmar, see 1986.0988.106.
Bowmar introduced a calculator in 1971, and had successful sales in 1972 and 1973. Assembly began in Mexico in mid-1974. The company went bankrupt in February of 1975 and stopped building calculators in the middle of that year. By 1976 distribution of Bowmar calculators had been taken over by Continental Microsystems.
No advertisements for this particular model have been found.
Location
Currently not on view
date made
1974-1975
maker
Bowmar/Ali
ID Number
1986.0988.206
catalog number
1986.0988.206
accession number
1986.0988

Texas Instruments TI-1000 Handheld Electronic Calculator

This simple handheld electronic calculator has a black plastic case, metal keyboard with silver-colored trim, and rectangular plastic keys.
Description
This simple handheld electronic calculator has a black plastic case, metal keyboard with silver-colored trim, and rectangular plastic keys. The twenty keys include ten digit keys, a decimal point key, a total key, four arithmetic function keys, a percent key, a change sign key, an off key, and an on/clear entry/clear key. A mark behind the keyboard reads: TI-1000. Behind this is an eight-digit LED display. A mark behind it reads: TEXAS INSTRUMENTS. The power jack is on the right side.
The back of the calculator has a compartment for a nine-volt battery at the center. The cover for the compartment is marked on the inside: 2 (/) 1015633. A mark above the compartment reads: TEXAS INSTRUMENTS (/) electronic calculator. Below the compartment is a space for a serial number but no serial number. A mark reads: LTA5078 (/) ASSEMBLED IN USA.
The calculator comes in a cardboard box. A mark on it reads in part: 1977 Texas Instruments Incorporated.
Compare 1986.0988.052. According to the online Datamath Museum, TI-1000 calculators with silver-colored trim on the keyboard were made after those with gold-colored trim.
Location
Currently not on view
date made
1978
maker
Texas Instruments
ID Number
1986.0988.051
catalog number
1986.0988.051
accession number
1986.0988

Commodore GL-997R Handheld Electronic Calculator

This handheld electronic calculator has an array of twenty-three oval plastic keys. These include ten digit keys, a decimal point key, four arithmetic function keys, a total key, a clear key, an exchange key, four memory keys, and a percentage key.
Description
This handheld electronic calculator has an array of twenty-three oval plastic keys. These include ten digit keys, a decimal point key, four arithmetic function keys, a total key, a clear key, an exchange key, four memory keys, and a percentage key. The on/off switch is to the right of the top keys. Text below the keyboard reads: commodore. Text above the eight-digit green fluorescent display reads: CUSTOM (/) GREEN LINE. An outlet for a power adapter is on the right side of the calculator.
Text on the back cover reads in part: Solid State Portable (/) Electronic Calculator (/) VOLTAGE (/) 4.5 V AC OPERATION (/) Use Commodore (/) adapter DC-420B (/) MODEL (/) GL-997R SERIAL NO. (/) 73954. It also reads: commodore japan limited (/) Made in Japan 200504-02. The case pops open (the screws at the bottom of the back are missing) and holds two AA batteries. The keyboard lifts up to reveal the circuitry, which includes a Commodore chip marked: GRBP-89 (/) 7518. This date code is the basis for the 1975 date of manufacture.
Compare 1986.0988.209
Reference:
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 57.
Location
Currently not on view
date made
1975
maker
Commodore Japan Limited
ID Number
1986.0988.127
accession number
1986.0988
catalog number
1986.0988.127

Unitrex Mini Handy 80R Handheld Electronic Calculator

This handheld electronic calculator has an off-white plastic case and an array of twenty rectangular plastic keys.
Description
This handheld electronic calculator has an off-white plastic case and an array of twenty rectangular plastic keys. These include ten digit keys, a decimal point key, four arithmetic function keys, a change sign key, a percentage key, a square root key, a clear entry key, and a clear key. Above the keyboard on the right is the on/off switch. Left of it is a switch for setting a constant and left of this a switch for setting the position of the decimal point.
Behind these is an eight-digit red LED display. A mark behind it reads: UNITREX (/) mini handy 80R. A jack for a power adapter is along the back edge.
The back has a compartment for a nine-volt battery. A mark on the back of the cover of this compartment reads: A17D03893. Text on a sticker attached to the calculator at the base of the back reads: UNITREX mini handy 80R (/) EIKO BUSINESS MACHINE CO. LTD. (/) DC 9V 0.45W MADE IN JAPAN.
The case is very similar to that of the Unitrex Mini 8 (1986.0988.017).
Reference:
[Advertisement], Chicago Tribune, November 28, 1974, p. C11. Unitrex Mini Handy 80R regularly $39.95, on sale for $34.95.
Location
Currently not on view
date made
ca 1974
maker
Eiko Business Machine Company
ID Number
1986.0988.018
catalog number
1986.0988.018
accession number
1986.0988

Sharp EL-8110 Handheld Electronic Calculator

This thin handheld electronic calculator has a metal case and twenty-two plastic, rounded square keys.
Description
This thin handheld electronic calculator has a metal case and twenty-two plastic, rounded square keys. These include ten digit keys, a change sign key, a decimal point key, four arithmetic function keys, a square root key, a clear/clear entry key, a % key, two memory keys, and a total key. Pushing up a button at the top right of the keyboard unlatches the cover on the eight-digit LCD display. A mark at the base of the calculator reads: SHARP ELSI MATE (/) EL-8110. A jack for a power adapter is along the front edge of the calculator.
A compartment for two squat cylindrical batteries is at the base of the back of the calculator. A mark at the top reads in part: SHARP (/) RATING: 2.4V – (DC) 0.025W (/) (RECHARGEABLE BATTERY EA-108) (/) OR 3V – (DC) 0.025W (AC ADAPTOR/CHARGER EA-10C) (/) ELECTRONIC CALCULATOR EL-8110 (/) NO. 67276478 BM (/) SHARP CORPORATION MADE IN JAPAN
References:
[Advertisement], Los Angeles Times, March 16, 1976, p. D2. Gives price of $39.95. A similar thin model, the Sharp EL-8010, had no memory, %, or square root keys. It sold for $29.95.
[Advertisement], Chicago Tribune, September 22, 1976, p. D13. Here the EL-8110 is described as the “’Thin Man’ pocket secretary.” The price listed is $39.95.
Location
Currently not on view
date made
1976
maker
Sharp Corporation
ID Number
1986.0988.139
catalog number
1986.0988.139
accession number
1986.0988

APF Mark 50 Handheld Electronic Calculator

This handheld electronic calculator is designed for scientific work. It has an array of digit keys with a decimal point key, keys for the four arithmetic functions, a clear entry/clear key, and an equals/constant key.
Description
This handheld electronic calculator is designed for scientific work. It has an array of digit keys with a decimal point key, keys for the four arithmetic functions, a clear entry/clear key, and an equals/constant key. Pushing down a function key allow one to use the digit keys to find trigonometric and inverse trigonometric functions in either degrees or radians. Other keys are converted by the function key to give square roots, natural logs, exponents, pi, and the inverse of a number. Still others perform vaious memory functions. A convert key transforms results from scientific notation to floating point notation or vice versa.
Text on the keyboard reads: aPF MARK 50 SCIENTIFIC CALCULATOR (/) LOG X = LN X + 2.30259.
A hole for the adapter is at the back, as well as a compartment for a battery. The calculator presently has no battery. The lid of the compartment is on the back. A mark on the inside of it reads: JAPAN (/) 0101641. A sticker attached to the back reads in part: aPF MARK 50 (/) OPERATING INSTRUCTIONS. It also reads in part: Use only Model 710 of 751S adaptor (optional) (/) to operate on A.C. (/) Model No. MARK-50 Serial No. J-44134 (/) MADE IN U.S.A. The back has four rubber feet.
The vacuum fluorescent display is behind the keyboard. It has two digits for the exponent, five for the mantissa, and two for the sign (one each for the exponent and the mantissa).
The APF Mark 50 calculator was advertised in the Los Angeles Times on June 8, 1975, as "New!" and "Ultra advanced!" It then sold for $59.95. According to a June 11, 1975, advertisement in the New York Times, the APF Mark 50 had originally sold for $89.95 and was then on sale for $40.00. An October 22, 1975, sale advertisement lists a price of $35. Similarly, a January 4, 1976, advertisement in the Chicago Tribune gives a price of $34.99. A September 16, 1979, advertisement in the Washington Post lists the model as selling for $9.99.
References:
Los Angeles Times, June 8, 1975, p. T19.
New York Times, June 11, 1975, p. 6.
New York Times, October 22, 1975, p. 14.
Chicago Tribune, January 4, 1976, p. 12.
Washington Post, September 16, 1979, p. K5.
Location
Currently not on view
date made
ca 1975
maker
APF Electronics
ID Number
1986.0988.170
catalog number
1986.0988.170
accession number
1986.0988

Radio Shack EC-231 Handheld Electronic Calculator

This handheld electronic calculator has a case in two shades of brown and an array of twenty rectangular plastic keys. These include ten digit keys, a decimal point key, a total key, and four arithmetic function keys.
Description
This handheld electronic calculator has a case in two shades of brown and an array of twenty rectangular plastic keys. These include ten digit keys, a decimal point key, a total key, and four arithmetic function keys. The leftmost column of keys includes %, square root, clear, and clear entry keys. The on/off switch is at the top of the keyboard. Behind this is an eight-digit vacuum fluorescent display. A mark above this reads: Radio Shack. A power jack is on the back edge.
The back of the calculator has a compartment for two AA batteries. Below this is a sticker that reads in part:
CAT. NO 65-610 (/) MODEL EC-231 (/) Radio Shack A DIVISION OF TANDY CORPORATION (/) DC 3V(“AA” CELL X 2) (/) FOR 120V AC OPERATION (/) USE ADAPTER 14-854 (/) 11467. It also reads: 8A6 (/) JAPAN.
Compare 1986.0988.040 (Radio Shack EC-231) and 1986.0988.46 (Radio Shack EC-380).
Reference:
Radio Shack, A Tandy Company, 1977 Catalog No. 276 , p. 152, accessed September 22, 2014, at radioshackcatalogs.com. The price listed is $10.95.
Location
Currently not on view
date made
1977
maker
Tandy Corporation
ID Number
1986.0988.040
catalog number
1986.0988.040
accession number
1986.0988

Unisonic 830-A Handheld Electronic Calculator

This handheld electronic calculator has a black- and silver-colored plastic and metal case with an array of twenty-one square plastic keys.
Description
This handheld electronic calculator has a black- and silver-colored plastic and metal case with an array of twenty-one square plastic keys. These include ten digit keys and a decimal point key (white) as well as four arithmetic function keys, a total key, a clear key, a clear entry key, and a percentage key (turquoise). The square root and change sign keys in the topmost row are orange. Right of these, a mark scratched on the case reads: UNISONIC-830A. Right of this is an on/off switch. Behind is an eight-digit green vacuum fluorescent display. A power jack is on the back edge.
A paper sticker on the back gives calculation examples. It reads in part: 830A. It also reads: SERIAL NO. (/) 004991 (/) MADE IN JAPAN. Below this is a compartment for four 1.5V (AAA) batteries.
Compare 1986.0988.114 (a Unisonic 811-A). That calculator lacks the square root and change sign keys.
No references found.
Location
Currently not on view
date made
ca 1977
maker
Unisonic
ID Number
1986.0988.113
accession number
1986.0988
catalog number
1986.0988.113

Casio Personal-I Handheld Electronic Calculator - Model H-802

This handheld electronic calculator has a plastic case that is black in front and cream-colored on the edges and back.
Description
This handheld electronic calculator has a plastic case that is black in front and cream-colored on the edges and back. The keyboard has an array of square plastic keys, including ten digit keys, a decimal point key, a total key, and four keys for arithmetic functions that are to the right of the digit keys. Across the top of the keyboard are AC (all clear), C (clear entry), square root, and percentage keys.
Behind the keyboard is an eight-digit display. Text behind this reads: CASIO personal-I (/) ELECTRONIC CALCULATOR. The on/off switch is at the top of the left side, and the socket for a power adapter is along the top edge at the left.
A battery compartment at the top of the back would hold two AA batteries. A sticker inside the compartment reads: 4409774. Text below the compartment reads: CASIO personal-I (/) BATTERY SUPPLY 1.5Vx2 (/) or use AC ADAPTOR AD-2S (/) 0.2W (/) H802 MADE IN JAPAN (/) BM CASIO COMPUTER CO. LTD.
Advertisements for the Casio Personal-I calculator appeared in the Chicago Tribune and the Los Angeles Times during 1976 and 1977. The calculator cost $9.95 initially, with sale prices as low as $8.90. Ball and Flamm also date the calculator to about 1976.
References:
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 52.
Chicago Tribune, June 29, 1976, p. 4.
Los Angeles Times, September 9, 1976, p. N3.
Los Angeles Times, March 17, 1977, p. T4.
Location
Currently not on view
date made
1976-1977
maker
Casio Computer Company
ID Number
1986.0988.024
catalog number
1986.0988.024
accession number
1986.0988

Coleco Digits Handheld Electronic Game

This electronic game is the general size and shape of a handheld electronic calculator. The purpose of the game is to figure out a four-digit code generated (but not displayed) by pressing the "CODE" button in the top row of keys.
Description
This electronic game is the general size and shape of a handheld electronic calculator. The purpose of the game is to figure out a four-digit code generated (but not displayed) by pressing the "CODE" button in the top row of keys. If the "SKILL" switch in the bottom row is set at 1, the secret code will have no digits larger than a five, if the skill position is 2, any digit may be used. Players guess the code by entering a number in the "CODE" section of the LED display. Pressing the "TRY" key reveals the number of correct digits in the correct position and the number of correct digits in an incorrect position. Clearing the display by pushing the C button, one can enter further guesses. If and when the correct secret code is numbered, a 4 and a 0 appear in status boxes and that display flashes.
An outlet for an adapter is on the fight side of the plastic case. The battery compartment on the back holds a nine volt battery. A sticker on the inside of this compartment reads: 44 01 8. A sticker below the compartment on the back gives instructions for playing the game. A mark below this sticker reads: HONG KONG.
References:
Chicago Tribune, November 25, 1978, p. S6.
Carla Kallan, "Electronic Games People Play: Toy Outlets Reflect the Arrival of the Computer Age," Los Angeles Times, December 11, 1979, p. H1, H5.
“DIGITS Instructions and Game Rules,” Amsterdam, N.Y.: Coleco Industries, Inc., 1978. This is online at: https://archive.org/details/manuals-handheld-games-Coleco-Digits. Accessed June 3, 2014.
Location
Currently not on view
date made
ca 1978
maker
Coleco
ID Number
1986.0988.130
accession number
1986.0988
catalog number
1986.0988.130

Sharp EL-5805 Handheld Electronic Calculator

This handheld electronic calculator was advertised in the newspaper the Washington Post as “Sharp’s Super Slim Super Scientist.” The scientific calculator has a metal case and thirty-five rectangular plastic keys.
Description
This handheld electronic calculator was advertised in the newspaper the Washington Post as “Sharp’s Super Slim Super Scientist.” The scientific calculator has a metal case and thirty-five rectangular plastic keys. The four lower rows of keys are similar to those found on many calculators, with ten digit keys, a change sign key, a decimal point key, four arithmetic function keys, three memory keys, and a total key. The next row up contains keys for various forms of exponents and logarithms, and an exchange key. The next row up (just below the top row of keys) contains a key for converting from degrees, minutes, and seconds to decimal degrees, as well as keys for trigonometric functions. The top row of keys includes an F key for switching the functions of the function keys, and keys for powers, square roots, clear entry, and clear. Pressing the function key converts the action of many of the keys in the top three rows. The memory keys also become keys for various statistical functions.
Above the keyboard are the on/off switch, and a switch for setting angular measure at degrees, radians, or grads. Behind this is an eight-digit LCD display, which can show a mantissa of six digits and a two-digit exponent.
At the base of the back of the calculator is a compartment for two squat cylindrical silver oxide batteries. Text above these reads in part: ELECTRONIC CALCULATOR (/) EL-5805. It also reads: NO. 70027227 (/) SHARP CORPORATION (/) MADE IN JAPAN BM.
The calculator has a brown plastic wallet. A mark on the front of it reads: SHARP (/) ELECTRONIC CALCULATOR.
References:
[Advertisement], Washington Post, August 26, 1977, p. A6. Calculator selling for $29.95. The same ad mentions the Sharp EL-500 selling for $16.95.
[Advertisement], Chicago Tribune, June 4, 1978, p. I18. Advertisement describes EL-5805, with a total of eight digits in the display (six mantissa, two exponents), selling for $29.95. It also mentions the EL-5806, with a total of ten digits in the display (eight mantissa, two exponents), selling for $34.95.
Location
Currently not on view
date made
1977-1978
maker
Sharp Corporation
ID Number
1986.0988.093
catalog number
1986.0988.093
accession number
1986.0988

Unitrex 95SL Handheld Electronic Calculator

This handheld electronic calculator has a tan plastic case and an array of twenty-four rectangular indented plastic keys.
Description
This handheld electronic calculator has a tan plastic case and an array of twenty-four rectangular indented plastic keys. These include ten digit keys, a decimal point key (that can also serve as a memory exchange key), a percentage key, a total key, four arithmetic function keys (one of which can also serve as a squaring key and another as an inverse key), a square root key, four memory keys, a clear entry/clear key, and a function/clear function key.
Behind the keys is an eight-digit red LED display. A worn mark above it once read: UNITREX. The on/off key is on the right side and the power jack is on the left side.
A sticker on the inside of the battery compartment on the back reads: 9 VOLT BATTERY. The compartment cover is missing. Text at the bottom of the case reads: HONG KONG.
The model number is deduced by comparing this object to objects on websites and in printed sources.
References:
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 171.
[Advertisement], Progress Bulletin [Pomona, California], March 28, 1977, p. 26. Calculator selling for $7.99.
Vintagecalculators.com website.
Location
Currently not on view
date made
ca 1977
maker
Eiko Business Machine Company
ID Number
1986.0988.016
catalog number
1986.0988.016
accession number
1986.0988

Radio Shack EC-220 Handheld Electronic Calculator

This relatively inexpensive handheld electronic calculator has an array of eighteen rounded rectangular keys, labeled on the keyboard. These include ten digit keys, a decimal point key, a clear entry/clear key, four arithmetic function keys, a % key, and a total key.
Description
This relatively inexpensive handheld electronic calculator has an array of eighteen rounded rectangular keys, labeled on the keyboard. These include ten digit keys, a decimal point key, a clear entry/clear key, four arithmetic function keys, a % key, and a total key. A mark next to the top two keys reads: RS. The eight-digit red LED display is behind the keyboard. A mark behind it reads: Radio Shack. A jack for a power supply is on the back edge. The on/off switch is on the left side.
The back of the calculator has a compartment for a nine-volt battery. A sticker on the inside of this compartment reads: 20313D30-02. The calculator has four rubber discs that serve as feet. A sticker on the back reads in part: EC-220 Calculator (/) Catalog No. 65-604. Further text reads: RADIO SHACK A TANDY CORPORATION COMPANY (/) FORT WORTH, TEXAS 76107. Further text reads: Assembled in Mexico. Another mark reads: Ser. No. (/) 267484.
Compare Rockwell 8R (1986.0988.012).
Reference:
Radio Shack, A Tandy Company, 1976 Electronics Catalog , p. 116, accessed September 22, 2014, at .radioshackcatalogs.com. Calculator has a list price of $16.95.
Location
Currently not on view
date made
1976
maker
Tandy Corporation
ID Number
1986.0988.038
catalog number
1986.0988.038
accession number
1986.0988

Unisonic 799 Handheld Electronic Calculator

This handheld electronic scientific calculator has a metal and plastic case and an array of twenty-six rectangular plastic keys. The ten digit keys and decimal point key are white. They can take on a different meaning if the orange F key is pushed.
Description
This handheld electronic scientific calculator has a metal and plastic case and an array of twenty-six rectangular plastic keys. The ten digit keys and decimal point key are white. They can take on a different meaning if the orange F key is pushed. The calculator can perform basic arithmetic; compute trigonometric and inverse trigonometric functions; and compute powers, exponents, natural logarithms, common logarithms, inverses, and square roots. It also has memory keys and a key for pi. To the right of the F key are radian/degree and on/off switches. A mark above this reads: Unisonic 799.
Behind the keyboard is an eight-digit green vacuum fluorescent display. This display also could show a five-digit mantissa and two-digit exponent (with signs for both).
A power jack is on the top edge.
The back of the calculator has a sticker describing advanced problem solving. It reads in part: 799-A. It also reads in part: SERIAL NO. (/) 030944 (/) MADE IN JAPAN. Below this is a compartment for four AA batteries.
Compare 1986.0988.116 (Unisonic 796).
References:
John F. Free, “Now There’s a Personal Calculator for Every Purpose,” Popular Science, 206 #2, February, 1975, pp. 78–81, 136–137. The Unisonic 799 is listed as selling for $99.
[Advertisement], Hartford Courant, June 13, 1976, p. 15M. Unisonic 799 on sale for $26.88.
Location
Currently not on view
date made
ca 1975
maker
Unisonic
ID Number
1986.0988.115
accession number
1986.0988
catalog number
1986.0988.115

Calfax 800CD Handheld Electronic Calculator with Instructions

This handheld electronic calculator has a plastic case with a metal band around the edge and a metal plaque on the back. It has square plastic keys that are indented at the middle (going from top to bottom).
Description
This handheld electronic calculator has a plastic case with a metal band around the edge and a metal plaque on the back. It has square plastic keys that are indented at the middle (going from top to bottom). In addition to an array of ten digit keys and a decimal key, the calculator has keys for four arithmetic functions, a total key, a constant key, a red cancel key, and an on/off switch.
A tag above the keyboard reads: calfax 800CD. Behind the tag is an eight-digit red LED display.
The metal plaque on the back has an “Operating Outline” printed on it. This includes a mark at the bottom: Made in Hong Kong.
The socket for the AC adapter is on the left side at the top. This example has no adapter. Rotating a screw at the base of the plaque opens a battery compartment which would hold a nine-volt battery. A sticker above the battery compartment reads in part: Serial No. 65780.
A paper instruction booklet received with the calculator indicates that if the calculator fails to function correctly outside the country of purchase, it should be returned to Supertronic Ltd., 180 Connaught Rd. West, 12th Flr., Hong Kong.
The "calfax" mark on the calculator is in the form of a trademark reportedly first used in commerce in 1972, filed in the United States January 1973, and registered in September 1975. No trademark registration is indicated on this example.
The Calfax 800CD was advertised as a lure for depositors at an Ohio bank in February 1974. Customers depositing $400 could purchase it for $38.50, with the adapter an additional $3.50. A deposit of $10,000 brought the price down to $19.50. By October of 1975, the device was listed in a newspaper advertisement as having an original price of $24.95 and on sale for $10.88, with an additional $2.99 for the adapter.
References:
The Columbus Telegraph, February 1974, p. 6.
Canton Observer and Eccentric, October 16, 1975, Section A.
Calculator Operating Manual and Guarantee Calfax 800 CD.
Location
Currently not on view
date made
1974-1975
maker
Calfax
ID Number
1986.0988.020
catalog number
1986.0988.020
accession number
1986.0988

Sharp EL-8118 Handheld Electronic Calculator

This handheld electronic calculator has some but not all of the functions of a scientific calculator. It has a metal and plastic case with twenty rounded square keys and ten rounded rectangular keys, for a total of thirty plastic keys.
Description
This handheld electronic calculator has some but not all of the functions of a scientific calculator. It has a metal and plastic case with twenty rounded square keys and ten rounded rectangular keys, for a total of thirty plastic keys. These include ten digit keys, a decimal point key, a total key, four arithmetic function keys, three memory keys, and a change sign key. Keys in the top row are for powers, squares, inverses, pi, clear/clear entry, “MU Δ%,” “% 5/4,” %, square roots, and dollars. To the right of the keyboard is a switch that can be set at the values 5/4, A, 0, 2, 4, and F. This may relate to the position of the decimal point.
Above the keys is an eight-digit green fluorescent display. A mark above it reads: SHARP ELSI MATE (/) EL-8118 (/) Electronic Calculator. To the right is an on/off switch. A jack for a power adapter is along the back edge.
The back of the calculator has a compartment at the top that holds two AA batteries. A mark below this reads: ELECTRONIC CALCULATOR (/) EL – 8118. It also reads: SHARP CORPORATION (/) MADE IN KOREA. Below this is a paper sticker with American, British, Canadian, Swedish, and Australian patent numbers. The largest U.S. patent number is 3621219.
The calculator has a dark brown leatherette carrying case with a metal snap.
Reference:
[Advertisement], Washington Post, January 13, 1977, p. A19. The Sharp 8118 calculator is listed as regularly priced at $19.95, on sale for $17.95.
Location
Currently not on view
date made
ca 1976
maker
Sharp Corporation
ID Number
1986.0988.091
catalog number
1986.0988.091
accession number
1986.0988

Keystone SC 656 Handheld Electronic Calculator

After achieving some success selling four-function calculators, the Keystone Division of Berkey Photo, Inc., began to manufacture calculators with more extensive capabilities.
Description
After achieving some success selling four-function calculators, the Keystone Division of Berkey Photo, Inc., began to manufacture calculators with more extensive capabilities. This handheld electronic calculator has a plastic case and trim, a metal keyboard painted black, and thirty plastic keys with a square base and circular tops. The four lower rows of keys include ten digit keys, a decimal point key, a key for the number pi, four arithmetic function keys, a total key, a cancel key, a change sign key, and a memory key. Two rows of function keys above this are for trigonometric and inverse trigonometric functions, exchange, exponents, natural logarithms, powers, logarithms to the base 10, and square roots. Above this is a charging indicator light, a radian/degree switch, and an on/off switch. The socket for a power jack is on the right side near the top.
A mark above the keyboard reads: Keystone SC 656. Behind this is a nine-digit vacuum fluorescent display. Behind this, attached to the back edge, is a holder for a loop that makes it possible to suspend the calculator. The loop itself is missing. A mark on the front edge reads: Made in U S A.
A sticker on the back gives instructions. Text at the bottom reads: Berkey (/) 2 Keystone Place (/) Paramus, New Jersey 07652 Serial # C251556.
Compare 1986.0988.365.
Berkey Keystone began selling calculators in 1972, and was out of the business by 1977. This calculator appears to be a relatively late example, hence the rough date.
Reference:
Victor K. McElheny, “Berkey – A Photo Finish in a Race with Giants,” New York Times, April 17, 1977, p. F1.
Location
Currently not on view
date made
ca 1975
maker
Berkey Photo, Inc. Keystone Division
ID Number
1986.0988.159
catalog number
1986.0988.159
accession number
1986.0988

Radio Shack EC-243 Handheld Electronic Calculator

This handheld electronic calculator has a plastic case in two shades of gray, a silver-colored keyboard, and twenty-three rectangular plastic keys. The meaning of the keys is written above them on the keyboard.
Description
This handheld electronic calculator has a plastic case in two shades of gray, a silver-colored keyboard, and twenty-three rectangular plastic keys. The meaning of the keys is written above them on the keyboard. Keys include ten digit keys, a decimal point key, a total key, four arithmetic function keys, and four memory keys. The top row has an on/off switch, a square root key, a % key, and a clear/clear entry key. Behind the keyboard is an eight-digit green fluorescent display. Text behind this reads: Radio Shack (/) MEMORY EC-243.
A compartment for two AA batteries is at the top of the back. A jack for a power adapter is along the back edge. A sticker below the compartment reads: Radio Shack (/) Cat. No. : 65-618 (/) Model : EC-243 (/) DC : 3V (“AA” Cell x 2) (/) For 120V AC Operation (/) Use AC Adaptor 65-735 (/) Custom Mfd. in Hong Kong for (/) RADIO SHACK. A Division of Tandy Corp. (/) 7J-208.
The calculator has a power adapter that plugs into the back edge. It is marked: Radio Shack (/) 273-1435 (/) 3V AC Adapter.
Compare 1986.0988.043 (Radio Shack EC-242).
Reference:
Radio Shack, A Tandy Company, 1978 Catalog No. 289, p. 146, accessed September 22, 2014, at radioshackcatalogs.com. The price listed is $14.95.
Radio Shack, A Tandy Company, 1979 Catalog No. 302, p. 129, accessed September 22, 2014, at radioshackcatalogs.com. The price listed is $14.95.
Location
Currently not on view
date made
1978-1979
maker
Tandy Corporation
ID Number
1986.0988.044
catalog number
1986.0988.044
accession number
1986.0988

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