Lot of 3 vintage calculators: Casio FX-850P, HP20 S (scientific) and HP10 B (business) Casio FX-850P: a scientific calculator introduced in 1987 and sold until 1999. It allows (a.o.) programming in BASIC. Detailed info.: https://en.wikipedia.org/wiki/Casio_FX-850P HP20 S: an algebraic programmable scientific calculator produced by Hewlett-Packard from 1987 to 2000. Detailed info.: https://en.wikipedia.org/wiki/HP-20S HP10 B: a student business calculator introduced in 1987. Detailed info.: https://en.wikipedia.org/wiki/HP-10B These calculators are vintage (roughly 30 years old), have been used and are still working fine. The items will not be sold separately.