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DATAMATH CALCULATOR MUSEUM

Texas Instruments Collegiate

Date of introduction:	1988	Display technology:	LCD
New price:	$60.00 (SRP 1988)	Display size:	10 + 2
Size:	5.7" x 6.1" x 0.40" 146 x 155 x 10 mm³
Weight:	5.5 ounces, 155 grams	Serial No:	A001
Batteries:	2*LR44	Date of manufacture:	mth 09 year 1988
AC-Adapter:		Origin of manufacture:	Taiwan (I)
Precision:	10	Integrated circuits:
Memories:	5
Program steps:		Courtesy of:	Joerg Woerner
		Download manuals:	(US: 12.1 MByte) (US-QR: 0.2 MByte)

The Collegiate doesn't look like a calculator developed by Texas Instruments.

The calculator uses a remarkable foldable keyboard with two different function layers. You can either view the 15 built-in constants and 30 English-Metric conversions or the Two-variable statistics.

Dismantling this Coolegiate calculator manufactured in September 1988 by Inventec Corporation in Taiwan reveals a well-engineered design centered around an unknown Toshiba single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and connected with two flexible connectors to a second PCB for the additional keys.
Running Mike Sebastian's "Calculator forensics" shows a pretty common result of 8.99999863704 - proving Toshiba as supplier of the chip.

Inspecting the PCB of this Collegiate calculator brought our attention to a small mark reading IOSC10-21B, we noticed similar marks already with other calculators manufactured by Inventec Corporation and started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

In other countries an identical calculator was distributed as SC-10 while Radio Shack sold the very similar EC-4025.

Don't miss the Personal Banker, one of the best calculators developed ever.

Interested in foldable calculators? Canon introduced already in 1980 with the Canon card F-72 a remarkable product.

If you have additions to the above article please email: joerg@datamath.org.