Vintage TI Articles

Texas Instruments SR-50A

Texas Instruments SR-50A

The Texas Instruments SR-50A calculator was intended to replace the SR-50 with a lower cost machine. Functionally, it does not add anything new, but it has an increased calculating precision when compared to the SR-50.

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Texas Instruments SR-50

Texas Instruments SR-50

The SR-50 calculator was introduced soon after the HP-45 and it was the first TI calculator to have trigonometric as well as hyperbolic functions.

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Texas Instruments SR-16

Texas Instruments SR-16

The Texas Instruments SR-16 is a scientific calculator but lacks the trigonometric functions. It was produced and sold for a relatively short period of time and it is less frequently seen than other models.

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TI Business Analyst I

TI Business Analyst I

This red led vintage financial calculator is in fact not the first version of the Business Analyst released by TI; the first version had a black face and was released three years earlier. However they are functionally equivalent.

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Radio Shack EC-3001

Radio Shack EC-3001

The Radio Shack EC-3001 printing calculator is a copy of the well-known TI-5050M portable printing calculator. It has 5 AA NiCd rechargeable batteries inside and used an AC9171 AC adapter. It uses thermal paper for printing.

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AC Adapter AC9130A

AC Adapter AC9130A

Fully tested Texas Instruments AC adapter AC9130A. The adapter is used for a number of TI calculators among them SR-16, SR-50A, SR-51A, SR-52, SR-56, TI-2550 II, TI-2550 III (there are others too).

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