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Casio 152 Desktop Calculator

Photo courtesy of Mr. Takaharu Yoshida

Casio's first integrated-circuit based electronic calculator, introduced in May of 1968. Utilized first-generation small and medium-scale MOS integrated circuits manufactured by NEC. 15-digit, four-function, AC-powered desktop machine with two memory registers and summation mode for each memory. Followed shortly by the Casio 121 (12-Digit, 1 memory), Casio 120 (12-Digit, no memory), and the Casio 161 (16-Digit, 1 memory), all introduced during 1968.