DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-10 Profit Guide
|Date of introduction:||1986||Display technology:||LCD|
|New price:||Display size:||10|
x 2.5" x 0.35"
121 x 65 x 9 mm3
|Weight:||1.9 ounces, 54 grams||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)|
The TI-10 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 Profit Manager missing the clock module.
Three special percentage calculations are implemented with six extra keys:
|• Calculation of cost limit for given selling-price and a targeted margin (CST column of extra keys):
<selling-price> SEL <target margin> MAR => cost limit
• Calculation of required selling-price for given cost and a targeted margin (SEL column of extra keys):
<cost> CST <target margin> MAR => required selling-price
• Calculation of achieved margin for given selling-price and cost (MAR column of extra keys):
<cost> CST <selling-price> SEL => achieved margin
the featured TI-10 Profit Guide manufactured in July 1986 by
Inventec Corporation in
Taiwan reveals a typical design of OEM (Original Equipment Manufacturer) calculators
developed in the 80s. Unfortunately the calculator chip is soldered in reverse
on the printed circuit board (PCB) but we suspect it is the Sharp LI3163 used
with the BA-20 Profit Manager, too.
Inspecting the PCB of this TI-10 Profit Guide calculator brought our attention to a small mark reading IOTI10-02A, we spotted similar PCB-Marks already with the TI-1796 and TI-1798 manufactured in 1986, too. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
The designation TI-10 was used in 2002 again for a scientific calculator.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, June 9, 2004. No reprints without written permission.