List of calculators

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

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Casio

FX-82
FX-350
Fx-6300G
FX-100D
FX-4500P
CFX-9850G - colour screen
Graph 20
Graph 25
Graph 35
Graph 65
Graph 100
Casio Algebra FX 2.0 Plus
list more Casio calculators here

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Hewlett-Packard

HP 9100A, HP 9100B - desktop programmable RPN calculator
HP 9805A
HP 9810A - second generation RPN calculator
HP 9815A, HP 9815S
HP 9820A
HP 9825A
HP 9830A
HP-01 - calculator watch
HP-6S
HP-9S, 9G
HP-10
HP-10B, 10BII
HP-10C
HP-11C - inexpensive alternative to HP-15C
HP-12C, 12C Platinum - very popular finance/business calculator
HP-17B, 17BII, 17BII+
HP-15C - first matrix and complex math model
HP-16C - first computer science model (programmable binary logic functions)
HP-17B
HP-18C
HP-19B, 19BII
HP-19C
HP-20S
HP-21 - smaller/cheaper HP-35 successor
HP-21S
HP-22 - smaller/cheaper HP-80 successor
HP-22S
HP-25, 25C - inexpensive scientific programmable, C model first with continuous memory
HP-27 - business/scientific, no programming
HP-27S
HP-28C, 28S - first RPL programmable, with graphics
HP-29C
HP-30S
HP-31E
HP-32E
HP-32S, SII - exact fractions
HP-33E, 33S
HP-34C
HP-35 - world's first handheld scientific calculator
HP-37E
HP-38E, 38C
HP-38G
HP-39G, 39G+
HP-40G
HP-42S - HP-41 compatible, dual-line display, non-expandable
HP-45 - first scientific calculator with a shift key
HP-41C/CV/CX - first alphanumeric, expandable
HP-46 - printing version of HP-45
HP-48S, 48SX, 48G, 48G+, 48GX - keyboard reconfigurable, expandable (SX,GX), RPL programmable, graphics
HP-48GII - released in 2004, emulated software with ARM CPU
HP-49G
HP-49G+ - released in 2004, emulated software with ARM CPU
HP-55 - programmable with timer but no cardreader
HP-65 - first keystroke programmable, with cardreader
HP-67 - HP-65 successor
HP-70 - lower-cost version of HP-80
HP-80 - first business calculator
HP-81 - printing version of HP-80
HP-91
HP-92
HP-95C
HP-97 - desktop, printing version of HP-67
124 S - dual power solar desktop calculator