Retro- [L. retro, adv., backward, back. Cf. Re-.] A prefix or combining form signifying backward, back; as, retroact, to act backward; retrospect, a looking back. [1913 Webster]

cal·cu·la·tor n 1: a small machine that is used for mathematical calculations [syn: calculating machine]

Old Documentation
Really Old Document
Well, Maybe Not quite That Old

Notice: These materials are long out of print. I present them here for historical purposes. I am doing and have done my best to contact the rights owners of these documents, mostly without success. If you are a rights owner in one or more of these documents, and if you disapprove of my making them available here, please get in touch with me and I'll take them down. If, on the other hand, you wish to explicitly allow me to continue making these documents available, I'd appreciate hearing about that too.
These manuals and books are made available in order to help preserve a computing era in which I have a particular interest, Every document on this page I have either scanned myself, or obtained permission from the person who did scan them. I hope they help enlighten you in your search to understand the fine old machines featured on this site.

The HP-IL SYSTEM: An Introductory Guide to the Hewlett Packard Interface Loop.
by Gerry Kane, Steve Harper and David Ushijima.
Copyright © 1982, McGraw-Hill Publishing.
McGraw-Hill hasn't responded to my emails. I'll keep trying.

HP Pascal 2.1 User's Manual
This is a big one. I'm scanning it and putting it up in pieces.
  1. Front Matter and Table of Contents

This site

  • Home Page
  • HP-71B
  • RPL Machines
  • Old Documents
  • Old Software

Elsewhere

  • Museum of HP Calculators
  • HP Computer Museum
  • HP41.org
  • Old HP and TI Calculators
  • HPCC, HP Handheld Club
  • HPCalc.org

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