Alexandru Balasa Articles

Texas Instruments SR-51A

Texas Instruments SR-51A

The SR-51A is the next step after the short lived SR-51 calculator and it was the high-end calculator in the Texas Instrument line in 1975 together with the lower prices SR-16 and SR-50A. The SR-51A has the same functionality as the SR-51.

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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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