DATAMATH

DATAMATH CALCULATOR MUSEUM

Texas Instruments CONCEPT I distributed by Zayre Corp.

Date of introduction:	March 1976	Display technology:	LED-stick
New price:	SRP $14.77	Display size:	8
Size:	5.5" x 2.8" x 1.4" 138 x 70 x 35 mm³
Weight:	3.9 ounces, 110 grams	Serial No:	1035661
Batteries:	9V	Date of manufacture:	wk 43 year 1976
AC-Adapter:	AC9180	Origin of manufacture:	USA (LTA)
Precision:		Integrated circuits:	TMS0972
Memories:
Program steps:		Courtesy of:	Joerg Woerner
		Download manual:	(US: 1.1 MByte)

Zayre Corporation was founded in 1956 by Stanley and Sumner Feldberg in Hyannis, Massachusetts as a discount department store chain. Zayre launched already in August 1975 the CONCEPT series of portable electronic calculators with the introduction of their first CONCEPT 24.

The Zayre CONCEPT Calculator Series culminated in June 1976 with the introduction of the Texas Instruments CONCEPT I, CONCEPT II, and CONCEPT III calculators based on the TI-1200, TI-1250, resp. SR-16 II but disappeared already in August 1979 with the clearance sales of the CONCEPT COMPACT calculators.

You have to look twice to catch the differences between this rare CONCEPT I and the TI-1200 calculator. The only differences between the calculator is the color scheme of the faceplate.

Dismantling the CONCEPT I reveals no surprises - the printed circuit board (PCB) of the calculator is 100% identical with the common TI-1200.

The CONCEPT I calculator was introduced in March 1976 and discontinued already in January 1977 with the blow-out sales of the CONCEPT I, CONCEPT II, CONCEPT 10, and the 2^nd and 3^rd design of the CONCEPT 24 calculators.

Fellow collectors - if you own a Zayre CONCEPT calculator, please report us the serial number and date code from the back of the calculator for our Database.

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