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Special Function Calculators based on theTexas Instruments TI 58 |
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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.. |
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USMC Harrier VSTOL/REST Calculator. 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. Made for MCDONNEL AIRCRAFT COMPANY |
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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. |
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The calculator is supplied in a fitted wooden case. For more details see the Navigation Calculators page. |
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Vintage Calculators |
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© Text & photographs copyright Nigel Tout 2000-2008 except where noted otherwise. |
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