APF Mark 30 Handheld Electronic Calculator

This handheld electronic calculator has an array of ten digit keys and a decimal point key on the left with an array of function keys on the right. The main function keys are clear entry/clear, addition, subtraction, multiplication, division, percentage, and switching of the entered number and the result. Pressing a red F key changes these to memory keys, a square root key, an inverse key, and a squared key. The device has an eight-digit display and a compartment for a battery behind this.
A label stuck to the back of the calculator reads in part: aPF mark 30 (/) SLIDE RULE CALCULATOR. It also reads: MARK 30 (/) Model No. Further text reads: R-21114 (/) Serial No. At the bottom of this label are the words: APF ELECTRONICS INC. (/) NEW YORK, N.Y. 10022 (/) MADE IN U.S.A. A mark on the inside of the lid for the battery compartment reads: JAPAN (/) K-140032.
A June 11, 1975, advertisement in the New York TImes claims that the Mark 30 originally sold for $69.95 and was on sale at Macy's for $25.00. An October 1975 advertisement in the New York Times lists the APF Mark 30 as selling for $24.95, with an additional $3.95 for the adapter. An ad in the January 4, 1976, Chicago Tribune gives a price of $24.99. The price of the adapter is not listed. Advertisements for the calculator appeared in the Los Angeles Times in 1975 and 1976.
Chicago Tribune January 4, 1976, p. 12.
New York Times, June 11, 1975, p. 6.
New York Times, October 23, 1975, p. 20.
Currently not on view
Object Name
electronic calculator
date made
ca 1975
APF Electronics
Physical Description
plastic (case; screen; keys material)
paper (sticker material)
metal (wiring; socket for jack material)
overall: 1 in x 3 in x 5 5/8 in; 2.54 cm x 7.62 cm x 14.2875 cm
ID Number
catalog number
accession number
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History, Kenneth E. Behring Center


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