Hand-held Calculators

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Hewlett-Packard HP-65

Hewlett-Packard HP-65

Hewlett-Packard HP-65

Distinctive features: The first hand-held, programmable calculator.

Technical details:
Display uses scientific notation, 10 digits mantissa, 2 digits exponent, red LED.

Scientific, programmable, with 100 program steps.

3.6v (3x AA rechargeable cells in a battery pack).

80 x 149 x 36 mm (3.2" x 5.9" x 1.4").

Launched in January 1974.

Made in USA.

Price US$795.

This was the first hand-held programmable calculator. Programs can be stored on magnetic cards, see photographs below, though these had been used previously with desktop programmable calculators. Program libraries for performing calculations for various disciplines could be purchased from HP.

With program card
With program card

Above, "Compound Interest" program about to be read from the magnetic card. The card is driven through the calculator by a tiny motor inside, from right to left.

Left, after the program has been read in, the card is inserted in a slot below the display and there provides the legends for the keys A to E.

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Hand-held Calculators

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Canon Pocketronic
Sanyo ICC-0081 & ICC-82D
Sharp QT-8B
Busicom LE-120A & LE-120S
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Minolta Minolcom
Brother PRO-CAL 408
Walther ETR3
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Ragen Microelectronic
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Texas Instruments 2500
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Olympia CD 81
apf Mark V
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Iain Jones International Mini A
Hewlett-Packard HP80
Litronix Checkmate
Heathkit IC-2009
MITS 150
Summit Ko9V, K16 & SE88M
Unicom 102
Victor 85 "Tallymate"
Elka 101
RFT minirex 75
Sharp EL-120
Sharp EL-805
Bowmar MX-55
Atlas-Rand, Berkey, & Keystone
Hewlett-Packard HP-65
Casio fx-10
Calcu-pen
Casio AL-8 & family models
Commodore 776M & 796M
Novus 650 "Mathbox"
Rockwell 8R
General Instrument EZ3000
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Monte Carlo
Texas Instruments Spirit of '76
Pulsar Calculator Watch
Compuchron Calculator Watch
Adler Lady & Sir
Elektronika B3-18A & C3-15
Speech+
Commodore S61
"Standard Type 1"
Sharp EL-8026
Texas Instruments TI-30
Canon Multi 8
Casio ST1
Wrist Calculators
Kosmos I & Kosmos Astro
Hanimex Calculator-Recorder
Navigation Calculators
TI58 Special Function Calculators
Sandvik 842S Coromant
"Standard Type 2"
Panasonic Electronic Ruler
Teal Photon
Casio Mini Card LC-78
Feet & inches calculators
SCAT Specialist Calculators
Sharp EL-826
Sharp EL-825
Sanyo CX-1
Elektronika MK-33 etc
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Curta
Slide Rule
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Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2012 except where noted otherwise.