Hewlett Packard
Model: HP-48 GX
Battery:
Adapter:
Year: 1993
Chip:
Info: The HP 48 is a series of graphing calculators designed and produced by Hewlett-Packard from 1990 until 2003. The series includes the HP 48S, HP 48SX, HP 48G, HP 48GX, and HP 48G+, the G models being expanded and improved versions of the S models. The models with an X suffix are expandable via special RAM (memory expansion) and ROM (software application) cards. In particular, the GX models have more onboard memory than the G models. The G+ models have more onboard memory only. The SX and S models have the same amount of onboard memory.
Donated from Annalisa Celeste
Model: HP-48 GX
Battery:
Adapter:
Year: 1993
Chip:
Info: The HP 48 is a series of graphing calculators designed and produced by Hewlett-Packard from 1990 until 2003. The series includes the HP 48S, HP 48SX, HP 48G, HP 48GX, and HP 48G+, the G models being expanded and improved versions of the S models. The models with an X suffix are expandable via special RAM (memory expansion) and ROM (software application) cards. In particular, the GX models have more onboard memory than the G models. The G+ models have more onboard memory only. The SX and S models have the same amount of onboard memory.
Donated from Annalisa Celeste
Model: HP-25
Battery:
Adapter:
Year: 1975/1978
Chip:
Info: The HP-25 was a hand-held programmable scientific/engineering calculator made by Hewlett-Packard between early January 1975 and 1978. The HP-25 was introduced as a cheaper (US$195 MSRP) alternative to the ground-breaking HP-65.
Model: HP-35
Battery:
Adapter:
Year: 1972
Chip:
Info: The HP-35 was Hewlett-Packard's first pocket calculator and the world's first scientific pocket calculator: a calculator with trigonometric and exponential functions. It was introduced in 1972
Wikepedia HP-35 HP-35 Simulator
Model: HP-38 E
Battery:
Adapter:
Year: 1978
Chip:
Info: The HP-38C and HP-38E were the high-end business members of the 30 series. The HP-38E was introduced first, followed a year later by the HP-38C which added continuous memory.
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