Hand-held Calculators

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Texas Instruments TI 58
Special Function Calculators based on it

The Texas Instruments TI 58 calculator introduced new possibilities in functionality by using a plug-in module with pre-programmed functions. The standard TI 58 model was supplied with the "Master Library Module" plugged into the module socket in the rear, as shown in the photographs below, but it was also possible to buy modules with libraries of functions for other types of calculation.

This is analagous to the modern personal computer which is a general-purpose machine in which it is possible to  install specialist software to do precisely what you want. So you could buy the general purpose TI 58 calculator and install the program module to give you the specialist functions required.

In this way Texas Instruments could provide a range of specialist calculators more cheaply, since the majority of each calculator was the same, only program libraries differed. Several companies took advantage of this flexibilty and had calculators produced with custom library modules their own special functions and special keyboard, some of which are featured here:

The Texas Instruments TI 59 calculator used the same program modules, and also had a magnetic card writer/reader for storing the users own programs, but does not appear to have been used by other companies as a basis for these specilised models..

The standard TI Programmable 58

TI 58

Texas Instruments TI Programmable 58.

Distinctive features: General purpose programmable calculator that can takes different plug-in library program modules.

Technical details:
Display is 10 digits, red LED.

Scientific programmable.

3.6v (3 x AA rechargeable batteries) .

82 x 150 x 27 mm (3.25" x 5.9" x 1.1").

Introduced 1977.

The "Master Library Module" memory module provides the standard functions of the calculator.
Different program modules were available to turn the calculator into a specialist one. These modules included ones for:

  • Electrical Engineering
  • Real Estate/Investment
  • Securities Analysis
TI 58 & program module
Master Library Module

The "Master Library Module".


Rear of the TI 58 with battery pack and "Master Library Module" removed.

The calculator with the rear cover removed.

USMC Harrier VSTOL/REST Calculator

USMC Harrier VSTOL/REST Calculator

USMC Harrier VSTOL/REST Calculator.

Distinctive features: General purpose programmable calculator fitted with a special program module and keyboard for the USMC AV8-A "Harrier" aircraft.

Technical details:
This calculator is fitted with a "Harrier" module to calculate Vertical & Short Take-Off & Land charcatersitics and Range, Endurance, Speed, & Time characteristics of the Harrier aircraft.
Originating in Britain as the Harrier the version used by the United States Marine Corps had the code AV8-A (and TAV8-A for the twin seat trainer version). 102 of the AV8-A were delivered between 1971 and 1976, and 8 of the TAV8-A were delivered in 1975 - 1976.



The specialised keyboard of the USMC Harrier calculator.

The Harrier Module

The "Harrier" Module.

Calculator rear

The rear of the calculator showing the program module and the strap attached by a pad with "Velcro". The use of this strap has not been confirmed - the main suggestion is that it appears to be for strapping the calculator to the thigh so it is handy when sitting in the cockpit.

Allianz insurance calculator



Distinctive features: Special version of the TI 58 with module and keyboard designed by the German Allianz financial company for use by its insurance agents.

Technical details:

This example "Assembled in Holland".

Allianz program module

The Allianz program module in place in the socket in the rear of the calculator.

Close-up of the keyboard of the Allianz calculator.

TI Navigatronic

Texas Instruments NavigatronicThe TI Navigatronic is a TI 58 fitted with a Navigation programs module but retains the standard calculator keyboard. For each navigation program a separate legend panel can be slid in at the top of the keyboard to label the special action of each of the function keys.

The calculator is supplied in a fitted wooden case.

For more details see the Navigation Calculators page.

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Hand-held Calculators

TI Cal-Tech
Canon Pocketronic
Sanyo ICC-0081 & ICC-82D
Sharp QT-8B
Busicom LE-120A & LE-120S
Sharp EL-8 & Facit 1111
Minolta Minolcom
Brother PRO-CAL 408
Walther ETR3
Bowmar 901B
Ragen Microelectronic
Compucorp 324G
Sharp EL-811 & derivatives
Royal Digital III & IV
Busicom LE-100A handy
Busicom LE-80A handy
Hewlett Packard HP-35
Canon LE-10
Rapidman 800
Texas Instruments 2500
Lloyd's Accumatic 100
Sinclair Executive
Casio Mini
Sanyo ICC-809
Sharp EL-801
Texas Instruments SR-10
Sperry Remington 661D & 661
Olympia CD 81
apf Mark V
Ramsgate M-11
Olivetti Divisumma 18
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
Casio AL-8 & family models
Commodore 776M & 796M
Novus 650 "Mathbox"
Rockwell 8R
General Instrument EZ3000
Check, billfold, wallet calculators
Monte Carlo
Texas Instruments Spirit of '76
Pulsar Calculator Watch
Compuchron Calculator Watch
Adler Lady & Sir
Elektronika B3-18A & C3-15
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
Sharp PC1211/Tandy TRS80 PC1
Slide Rule
Otis King L

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2015 except where noted otherwise.