CAL-Q-TAX calculator by Texas Instruments

Date of introduction:  1984 Display technology:  LED-stick
New price:   Display size:  10 (8 + 2)
Size:  6.4" x 3.2" x 1.5"
 162 x 81 x 37 mm3
Weight:  8.5 ounces, 240 grams Serial No:  
Batteries:  BP1A Date of manufacture:  
AC-Adapter:  AC9131 Origin of manufacture:  USA
Precision:  13 Integrated circuits:  TMC0501E, TMC0582, TMC0583, TMC0571, 2*TMC0598 
Logic:  AOS - 8 Pending Operations, 9 ()    
Memories:  0-60    
Program steps:  480-0 Courtesy of:  Kirk B. Muri

The innovative TI-58 was the perfect base for a lot of customized calculators. The idea behind these products was the novelty of the Solid State Software Modules with up to 5000 program steps.

TI-58-CalQTax_1.jpg (42456 Byte)The CAL-Q-TAX application was developed by the Bureau of National Affairs, Inc., Washington D.C. in 1984 to calculate Estate and Gift Taxes. Compared to the usual drop-in modules this calculator uses an extender developed by Hand Held Products

Don't miss the incotax application using the same extender for the module.

Compare it with a similar product by the insurance companies Agrippina, Allianz, Lloyd, LVM, Nordstern and Victoria or the Bossard screwing joint calculator. Even the French carmaker Chrysler-Simca used the TI-58, don't miss the Chrysler Credicavia. Don't miss the USMC HARRIER flight computer based on the TI-58 calculator, too.

A colorful calculator appeared with the Pool Water Analysis module.


horizontal rule

If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.