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Casio PRO fx-1

Date of introduction:	September 1977	Display technology:	Fluorescent
New price:		Display size:	10 (8 + 2)
Size:	7.7" x 4.5" x 1.4" 196 x 115 x 35 mm³
Weight:	13.6 ounces, 386 grams	Serial No:	6179316, 2253042
Batteries:	4*AA	Date of manufacture:	mth 01 year 1978
AC-Adapter:	AD-4160	Origin of manufacture:	Japan
Precision:	10	Integrated circuits:	Hitachi HD36106, HD36136, HD36162, HD37603
Memories:	11
Program steps:	127	Courtesy of:	Joerg Woerner

Casio Computer Co., Ltd introduced with the fx-10 its first scientific handheld calculator in May 1974, almost 2 years after the Mini CM-601.

It took more than three years before in September 1977 the PRO fx-1 their first and only hand-held programmable calculator with integrated magnetic card reader appeared on the market. Technically is the PRO fx-1 based on the fx-201P introduced already in 1976 and then competing with the SR-56.

Timing of the market launch of the PRO fx-1 was a disaster! While it could barely compete with the SR-52 introduced already in 1975, blew it the revolutionary TI-59 simply away.

Casio learned their lessons well and introduced within two years with the FX-501P and FX-502P their first keystroke Programmable Pocket Calculators with LC-Display and leading over FX-601P and FX-602P, introducing a dot matrix LC-Display, to the very successful FX-702P "Pocket Computer".

Dismantling this Casio PRO fx-1 manufactured in January 1978 reveals an interesting design centered around multiple Integrated Circuits manufactured by Hitachi, Japan.

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