Hewlett-Packard HP48 2 x TOSEC

"The HP-48 is a series of graphing calculators using Reverse Polish notation (RPN) and the RPL programming language, produced by Hewlett-Packard (HP) from 1990 until 2003. The series include 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." (Wikipedia)

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Hewlett-Packard HP48 - BIOS (TOSEC-v2006-03-18)
Hewlett-Packard HP48 - Various (TOSEC-v2006-03-18)

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