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Calculator Articles & Other Information

Last Updated 2/15/2019

This page of the Old Calculator Web Museum serves as an index to articles by the curator or other contributors that document, explain, or otherwise inform with regard to the history and technology of the wonderful machines, companies, and people that this museum is dedicated to preserving. If you have a story that you would like to share regarding your experiences with calculating technology from the 1960's through the mid-1970's, I'd definitely like to hear from you.

Recollections & Reflections
The Friden EC-130: The World's Second Electronic Desktop Calculator [Nicholas Bodley]
Monroe 1880 Programming Memories [John Engels]
My Life & Times at Friden/Singer [Dick Ahrens]
Wang 300-Series Calculator Memories [John Lesesne]
My Early Days at Wang Laboratories [Dennis McNurland]
The Fascinating Engineering Inside an Early Electronic Calculator [Cliff Stoll on the Friden EC-132 Courtesy of Popular Mechanics Magazine]

Calculator History
The Victor 3900 - History's Forgotten Miracle [Rick Bensene]
The History of Compucorp [Rick Bensene]
Wang Laboratories: From Custom Systems to Computers [Rick Bensene]
A Timeline of Calculator History [Rick Bensene]
Calculator News Article Archive [Rick Bensene]

Calculator Technology Notes
Tech Notes: Hitachi HD3100-Series PMOS Calculator IC Datasheets [PDF, 21 Pages, 44MB] [NEW]
Tech Notes: Sharp Calculator Serial Number Decoding
Tech Notes: Wang 360SE
Tech Notes: Wang 300-Series Logibloc Inventory
Tech Notes: Wang Laboratories IC Reference
Tech Notes: Wang 700-Series Calculator Architecture
Tech Notes: Wang 700-Series Logibloc Inventory
Tech Notes: Known Wang 400-Series Program Codes
Tech Notes: Compucorp HTL Chipset Microcode Instruction Set
Tech Notes: Schematic of Heathkit IC-2008A Calculator
Tech Notes: Friden EC-130 Block Diagram [PDF, 1 Page, 283K]
Tech Notes: Friden 132 Square Root Mathematics [PDF, 3.3MB]

Calculator Manuals
Service Documentation: Friden EC-130/EC-132 MDD (Master Design Document) Printout Definition Document [PDF, 23 Pages, 13MB] [NEW]
Service Documentation: Early "Four Counter" Friden EC-130 MDD Computer Printout [PDF, 147 Pages, 18.4MB]
Service Documentation: "Four Counter" Friden EC-132 MDD Computer Printout [PDF, 188 Pages, 133MB] [NEW]
Service Documentation: Friden EC-130/EC-132 Service Fliers #99(5/27/1964) to #244(6/28/1966) [NEW]
Service Documentation: Friden EC-130/EC-132 Electronic Calculator Service Letters #1(7/21/1964) to #35(6/3/1968)
Service Manual: Friden EC-130 Service Manual [PDF, 161 Pages, 430MB] [NEW]
Service Manual: Friden EC-130 "Three Counter" Service Manual Supplement [PDF, 26 Pages, 80MB] [NEW]
Service Manual: Friden EC-130 Field Service Manual [PDF, 51 Pages, 18MB] [NEW]
Service Manual: Friden EC-132 Temporary Service Manual [PDF, 44 Pages, 50MB] [NEW]
Service Manual: Monroe 920 Service Manual [PDF, 116 Pages, 10MB]
Technical Manual: Monroe 925 Logic and Timing Manual [PDF, 116 Pages, 10MB]
Technical Manual: Canon Canola 1200 Logic and Timing Manual [PDF, 23 Pages, 4.8MB] [NEW]
Service Manual: Friden EC-1113 Service Manual [PDF, 132 Pages, 74MB] Service Manual: Friden EC-1115 Service Manual [PDF, 118 Pages, 84MB]
Reference Manaul: Wang 452 Advanced Scientist Self-Teaching Reference Manual [PDF, 240 Pages, 109MB]
Operation Manual: Rockwell 960 Operator Manual [PDF, 83 Pages, 73.7MB] [NEW]
Operation Manual: Victor 4900 Operator Manual [PDF, 48 Pages, 4.2MB]
Programming Manual: Victor 4900 Programmer's Manual [PDF, 100 Pages, 10.4MB]

Historical Documents
Friden History - A Profile, 1967
Late 1965 Friden Competitive Analysis [PDF, 51 Pages, 22.7 MB]

Friden STW-10 In Operation [4.4 MB]
Casio fx-1 In Operation [1.5 MB]
SCM/Marchant Cogito 240SR In Operation [5 MB]
Wang 360KT/360SE In Operation [5 MB]
Documentary on Early Japanese Electronic Calculator History [YouTube]

Other Information
The Old Calculator Museum Blog
The Physical Old Calculator Museum
Old Calculator Web Museum FAQ
Send EMail to the Museum
Links to Other Calculator-Related Sites
Acknowledgements, Credits, and Thanks
Old Calculator Web Museum Change Log
Article on Museum in "Yesterday's Office"