Casio, Inc. and its parent company Casio Computer Co. Ltd., announced today that one billion electronic Casio calculators have been sold worldwide. The company’s first electronic calculator – the 001, went on sale in 1965, and the company just passed the one billion mark at the end of December.
When I went to high school it was actually mandatory to get one of those scientific calculators and if my memory serves me right I think Casio was about the only brand allowed at the time.
So I have some Casio calculators (various fx models) as well. (Not that I use them anymore, since I use the PC for the basic calculation needs I have.)