List of calculators (original) (raw)

This is a list of types of calculators, many of which are obsolete but hoarded by legions of admiring collectors.

Many of these old devices belong in a museum [1]

Casio

HP-35 - first scientific calculator
HP-80 - first business calculator
HP-45 - first scientific calculator with a shift key
HP-65 - first keystroke programmable, with cardreader
HP-70 - lower-cost version of HP-80
HP-55 - programmable with timer but no cardreader
HP-46 - printing version of HP-45
HP-81 - printing version of HP-80
HP-21 - smaller/cheaper HP-35 successor
HP-22 - smaller/cheaper HP-80 successor
HP-25, 25C - inexpensive scientific programmable, C model first with continuous memory
HP-27 - business/scientific, no programming
HP-67 - HP-65 successor
HP-41 - first alpha-numeric, expandable
HP-15C - first matrix and complex math model
HP-16C - first computer science model (programmable binary logic functions)
HP-28C, 28S - first RPL programmable, with graphics
HP-32S II - fractions
HP-48 - keyboard reconfigurable, expandable (SX,GX), RPL programmable, graphics
HP-49G
HP-49G+ - newly released
124 S Dual Power Solar Desktop Calculator