Texas Instruments TI-1040A Tax Pak

Date of introduction:  1981 Display technology:  LCD
New price:   Display size:  8
Size:  4.6" x 2.6" x 0.35"
 116 x 66 x 9 mm3
Weight:  1.9 ounces, 54 grams Serial No:  
Batteries:  2*LR43  Date of manufacture:  wk 51 year 1980
AC-Adapter:   Origin of manufacture:  USA (ATA)
Precision:  8 Integrated circuits:  TP0311
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 1.7M Bytes)

This TI-1040 was sold together with some unknown accessories as "TI-1040A Tax Pak" and looks at first glance like a standard TI-1001. Comparing these two calculators reveals an astonishing difference: These calculators make use of two different display frames:

Rectangular design: TI-1001, TI-1031, TI-1850, TI-1880, E.T. calculators.
Rounded design: TI-1010, TI-1030, TI-1040, TI-1070 calculators.

Collectors, I need your help. If you know the accessories delivered with the TI-1040A Tax Pak, please contact me:

TI-1040_PCB.jpg (35809 Byte)This particular calculator was manufactured in December 1980 and makes still use of the printed circuit board (PCB) and single-chip calculator circuit TP0311 introduced in 1978 with the TI-1030.



Find here an excerpt from the Texas Instruments Incorporated leaflet CL-199J dated 1981:

TI-1040A Tax Pak

The fast, easy, way to complete your 1980 income tax short form.

Here’s everything you need to finish your 1040A short form. 

The Do-It-Yourself Tax Guide leads you through each item on the 1040A form. Complex tax jargon is presented in easy-to-understand, everyday English. Also included are official IRS 1040A tax forms, instructions and an envelope. 

The TI-1040 speeds calculations and reduces math errors. Four-key memory, percent and square root and automatic constant. The easy-to-read 8-digit liquid crystal display and APD* (automatic power down), a special battery-saving feature, make this sleek and stylish calculator even easier to use. 

* Registered Trademark of Texas Instruments Incorporated

© Texas Instruments, 1981

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© Joerg Woerner, March 6, 2006. No reprints without written permission.