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.
Texas Instruments SR-50
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Alexandru Balasa Articles
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.
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.
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.
HP-41 Battery Shield
This battery shield is designed to fit the battery location on a HP-41 calculator and protects somewhat the calculator in the event the batteries leak. The shield can only be used with alkaline batteries, it can not be used together with the 82120A rechargeable battery.
Olivetti Logos 9 Calculator
The Olivetti Logos 9 Calculator is a rechargeable printing basic calculator. It comes in two versions, a silver and a black version.
HP-91 92 97 Rebuilt Battery
The HP-91 92 97 Rebuilt Battery 82033A fits the TopCat series of calculators: HP-91, HP-92, HP-97, HP-97S. In addition, some HP peripherals also use this battery: printers HP-82143A and 82162A, cassette tape HP-86161A.
HP-35 Rebuilt Battery 82001B
The HP-35 rebuilt battery fits all HP Classic family of calculators: HP-35 (all versions), HP-45, HP-55, HP-65, HP-70, HP-80.
New TI-59 Magnetic Cards
New TI-59 magnetic cards used to record programs and data for the TI-59 calculators