HP 71B Pocket Computer from 1984

This video about the venerable HP 71B pocket computer from 1984. Sections of this video: 0:00 - Intro 4:28 - Physical Design 7:43 - Calc Mode 11:55 - File System 12:55 - BASIC Mode 16:11 - LEX Extensions 17:23 - Summary Some links related to this video: - "Syntactic device for chain calculations" patent https://patents.google.com/patent/US4698784 - Steven T. Abell's Usenet post about the 71-B. https://groups.google.com/g/comp.sys.hp48/c/Dik9RgtSLnE/m/QmD6gskwcQcJ - Holy Joe's 71B site http://holyjoe.org/HP71/ - Saturn source code to REVLEX - http://holyjoe.org/HP71/lexfiles/REVLEX%20source.txt For more calculator videos, checkout my channel https://youtube.com/CalculatorCulture