HP-41 Extension Module
HP-41 extension (or expansion) modules allowed the user of a HP-41 programmable calculator to extend the functionality of the machine. The HP-41 had room for up to four expansion modules at the back of calculator.
The HP-41 was not the only calculator of its generation that allowed expansion modules. The TI-58 and TI-59 also had pluggable ROM modules. The HP-41 modules were however much more versatile.
Read more about HP-41 Extension Module: The Memory Modules (HP-41C Only), The Application Pacs, The 82104A Card Reader, The 82182A Time Module, The 82143A Thermal Printer/Plotter, The 82153A Optical Wand, The 82180A Extended Functions Module, The 82181A Extended Memory Module, The HP82160A HP Interface Loop (HP-IL) Module
Famous quotes containing the word extension:
“The motive of science was the extension of man, on all sides, into Nature, till his hands should touch the stars, his eyes see through the earth, his ears understand the language of beast and bird, and the sense of the wind; and, through his sympathy, heaven and earth should talk with him. But that is not our science.”
—Ralph Waldo Emerson (1803–1882)