Texas Instruments Investment Analyst

Date of introduction:  1979 Display technology:  LCD
New price:  $54.95 (SRP Sep. 1980) Display size:  8 (5 + 2)
Size:  5.3" x 2.9" x 0.35"
 134 x 74 x 9 mm3
Weight:  2.9 ounces, 82 grams Serial No:  9832924
Batteries:  2*LR44 Date of manufacture:  wk 24 year 1980
AC-Adapter:   Origin of manufacture:  USA (ATA)
Precision:  11 Integrated circuits:  TP0320 (CD3201)
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 15.5M Bytes)

InvestmentAnalyst_Back.jpg (308481 Byte)InvestmentAnalyst_P1.jpg (200795 Byte)Within the Majestic series Texas Instruments started with the Business Analyst to introduce always a financial counterpart to the scientific calculator. The Business Analyst-II with its combined financial and statistical functions continued this approach.
The TI Investment Analyst removed the statistical functions and improved some of the financial functions.

TI-InvestmentA_IC.jpg (38286 Byte)
Dismantling the TI Investment Analyst reveals with the TP0320 CMOS calculator chip with the first ROM version CD3201. Simply by comparing the designation of the integrated circuits of the calculators you'll get the first members of the slimline family:


TP0320    (CD3201) TI Investment Analyst 
TP0320    (CD3202) TI-30-II 
TP0321    TI-50
TP0322    TI-Business Analyst-II
TP0323    TI-53
TP0324    TI-35
TP0326    TI-38 and TI-20

If you compare the sales prices of three (internally identical) calculators you'll notice:

$50 Investment Analyst
$40 Business Analyst-II
$20 TI-35

That's the power of marketing!

In 1984 the era of the slimline calculators was over and Texas Instruments introduced a family of three calculators manufactured in Taiwan:

TI-30 III   
TI-35 II

Don't miss the rare Business Card, probably the missing calculator using one of the TP032x chips.

We discovered recently with the Sharp EL-503 a scientific calculator with the TP0327 single-chip calculator circuit, closing the missing link between the TP0326 located in the TI-38 and the TP0328 known from the Jeppesen Sanderson avstar.

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

Slimline Investment Analyst

A new dimension in easy-to-use financial analysis of investments.

Analyze ant investment in which you can determine the amount of money spent on the investment, the amount returned by the investment, and the length of time the investment was owned.
Get rapid and accurate evaluations of stocks, bonds, options, warrants, commodity futures, real estate and numerous other types of investments. It handles them in terms of three variables buying price, selling price, and yield (current, annual, yield to maturity, or total period of ownership).
Features compound interest factor, and days between dates. Four-function memory with Constant Memory* saves data stored in the calculator even when turned off.

* Registered Trademark of Texas Instruments Incorporated

Texas Instruments, 1981


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If you have additions to the above article please email:

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