HP-48
The
HP-48 is a series of
electronic graphing calculators produced by
Hewlett-Packard from 1990 until 2003. The calculators in this series were the HP-48S, HP-48SX, HP-48G, HP-48GX, and HP-48G+. The HP-48G II is not really a member of this series, but rather much more closely related to the
HP-49G and
HP-49G+. The 48SX and 48GX were expandable via special
RAM and
ROM cards that could be purchased, whereas the rest were not.
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