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  1. RPN calculator app for the TI-83 Plus and TI-84 Plus inspired by the HP-42S (rpn ti83 ti84 ti hp hp42s) (github.com)
    3 points by jgrahamc 9 hours ago | 1 comment
  2. People's Computer Company newsletter, issue 1, October 1972 (education history basic dec hp) (archive.org)
    1 point by Screwtapello 16 days ago | discuss
  3. The Apollo Archive (apollo hp unix) (rees.org | ia)
    7 points by Lammy 18 days ago | discuss
  4. Retrocomputing Pages: HP-1973 (hp) (sarahkmarr.com | ia)
    1 point by jgrahamc 57 days ago | discuss
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Two Stop Bits is a discussion web site about retro computing and gaming.