Graeme McNay on Twitter: "Kraftwerk - Pocket Calculator (EMI cassette single, 1981). The calculator on the cassette box is based on a Casio FX-502P. (Manufactured in 1978/1979). https://t.co/p9CJpnGMtX" / Twitter
CASIO Taschenrechner FX-991 DE X | Taschenrechner | technischer Zeichenbedarf
Amazon.com: Casio fx-55 PLUS Elementary/Middle School Fraction Calculator : Everything Else