Casio Personal Mini Handheld Electronic Calculator

Casio Personal Mini Handheld Electronic Calculator

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Usage conditions apply
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.
New York Times, January 25, 1976, p. 104.
Vintage Technology website.
Washington Post, March 23, 1975, p. A20.
Currently not on view
Object Name
electronic calculator
Other Terms
electronic calculator; Handheld
date made
Casio Computer Company
place made
Physical Description
plastic (case; keys; display cover; carrying case material)
metal (circuitry materail)
paper (stickers material)
overall: 7/8 in x 2 3/4 in x 5 5/8 in; 2.2225 cm x 6.985 cm x 14.2875 cm
ID Number
catalog number
accession number
Credit Line
Gift of John B. Priser
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History
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If you divide a number by 0 and press the arrow key, you will see the calculator start counting and it will continue to do so until turned off, or by pressing the clear button.
I have this calculator and I still use it . Works fine. Never had a guide to it or a manual but it isn't that hard to use. Mine looks just like the one in your picture.
This calculator was interesting in that if a result took more than 6 significant digits to the left of the decimal point, pressing the arrow key would display thos high-order digits.

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