DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-10 Profit Guide
|Date of introduction:||1986||Display technology:||LCD|
|New price:||Display size:||10|
|Size:||4.8" x 2.6" x 0.3"|
|Weight:||1.8 ounces||Serial No:|
|Batteries:||n.a.||Date of manufacture:||mth 07 year 1986|
|AC-Adapter:||Origin of manufacture:||Taiwan (I)|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 1.5 MByte)|
Profit Guide looks familiar to us and seems to be a mix of the basic TI-1746
with the calculating functions of a BA-20 missing
the clock module.
Dismantling the TI-10 Profit Guide reveals the typical construction of OEM calculators developed in the 80's. Unfortunately the calculator chip is soldered reverse on the printed circuit board (PCB) but we could identify Inventec Corporation from the date code as manufacturer of the calculator.
Three special percentage calculations are implemented with six extra keys:
|Calculation of cost limit for given selling-price and a
(CST column of extra keys)
<selling-price> SEL <target margin> MAR => cost limit
|Calculation of required selling-price for given cost and a
(SEL column of extra keys)
<cost> CST <target margin> MAR => required selling-price
|Calculation of achieved marging for given selling-price and cost:|
(MAR column of extra keys)
<cost> CST <selling-price> SEL => achieved margin
The designation TI-10 was used in 2002 again for a scientific calculator.
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© Joerg Woerner, June 9, 2004. No reprints without written permission.