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New entries for
IBM 1401 Restoration Project
Chronology Web Page


You might also wish to check the following:

2021 Additions
Sept 26, 2021 IBM 1401 Product Announcement 1959 video, linked from here
Williams Tube Memory, linked from here
August 29, 2021 Full 3D working simulation of a 1401 system
March 6, 2021 Germanium transistors: logic circuits in the IBM 1401 computer
and - Rick Dill's Comments
Linked from Components/Devices

2020 Additions
Oct 23, 2020 Evolution of the 1401 Control Panel
Oct 18, 2020 Some Action, links found in Serious ;-)
CT Tapes Exercise
a micro 1401 system
- images of above
Sept 29, 2020 COBOL Paul Pierce's tape adc00223, via Van Snyder
From Van Snyder - Mokotoff FORTRAN Docs
June 26, 2020 PoundsShillingsPence - "Patch"
June 4, 2020 Miniature Model of 1401 System
April 13, 2020 Human breath on exposed germanium transistor - from Robert Garner
Jan 10, 2020 A discussion of the IBM 1401-H sometimes called the "Series 50" version of the 1401.

2019 Additions
Dec 31, 2019
8:27 PM
the latest blast of puns from Van Snyder
Dec 28, 2019 an "Outsider's" view of an IBM 1401
Dec 14, 2019 Superceeded "1401 IOCS 1401 Input/Output Control System ( OS ;-))" with
IBM�s early operating systems for 1410, 7090, and S/360
added 1401, 1410 Successors
Nov 15, 2019 Added two papers on random number generation on decimal machines at miscellaneous
Nov 1, 2019 Added KWIC (Key Word In Context) examples
and a flurry of e-mails listed at IBM729-VacuumPump.html#flurry
Oct 11, 2019 Added State of the 1401 facility series from Carl Claunch
Sept 18, 2019 Added two of Ken's Card Reader Clutch reports to
ContinuMaint/ContinuMaint.html#Adventures
Aug 31, 2019 Added Risky line printer music on a vintage IBM mainframe by Ken Shirriff
linked from here (2nd entry)
Aug 31, 2019 Added entry to (Tape Adapter Unit) e-mails
linked from here
July 26, 2019 Added Enginering article about IBM design practice, ALDs, SMS cards
linked from here
July 4, 2019 Added to 2019 for French TV and 2019 from Robert Garner
July 2, 2019 Added (unlinked from main site) IBM-360-1401Compatible.html
June 30, 2019 Addition to Ron Williams bio
Added adaptations of two of Judith Haemmerle's Flickr.com collections.
Lubrication Guide for the IBM 513 Punch Section, Reader Section"
Some of this is useful for the IBM 1402, a later generation.
Added or enhanced:
- http://ibm-1401.info/DemoProgs.html#1401RFI-Music
- http://ibm-1401.info/Movies-n-Sounds.html#1403Printer
- http://ibm-1401.info/Movies-n-Sounds.html#Flury
June 24, 2019 Added Mark Greenia's pictures of CE's maintence kit for 1403-printer
Feb 24, 2019 Added Technical Overview & Details
Feb 6, 2019 Added Lozenge e-mails, 14 of 'em
Jan 22, 2019 links here -
Why 132 Columns?, Analysis by Ken Ken Shirriff Dec 22, 2019
Jan 11, 2019 added - external link Morse/1401 demo by Michael Albaugh
link just below here
Jan 6, 2019 I have added links the websites of the card images to
Card images, Whittemore , Scott, Jones, Fischer ( 2nd entry down)
Jan 6, 2019 I have been reminded by a viewer that I haven't updated this page for a while.
Sorry, will improve - until I forget again. (Hopefully not until a further 5 years or so)

2018 Additions
Aug 16 Tabulating Equipment and Work Measurement by U.S. Dept. Commerce, Bur. of the Census
linked from Unit-Record-Equipment
July 1 FARGO FARGO, Fourteen-O-One Automatic Report Generating Operation language
May 10 Fortran Geezer Visit sched June 10, 2018
April 28 (Revised for easier access)
Show the pages inPreventative Maintenance as found in Customer Engineering 1401 Pocket Reference Manual IBM Form 56 389
into the following sections:
- 1401 Processor - Prev. Maint., in 1401-CE_Pocket-Ref-Man-56-389, page 28
- 1402 Card Reader/Punch - Prev. Maint., in 1401-CE_Pocket-Ref-Man-56-389, page 29+
- 1403 printer - Prev. Maint., in 1401-CE_Pocket-Ref-Man-56-389, page 32+
- 1406 Memory - Prev. Maint., in 1401-CE_Pocket-Ref-Man-56-389, page 28
- 729 tapes - Prev. Maint., in 1401-CE_Pocket-Ref-Man-56-389, page 38+
April 24 Added Some Docent Reports, 2018
March 26 Added Documation Card Reader-PC-USB-Knittel
linked from index.html#UR-Reader
March 21 Added Fortran Geezer Visit - scheduled for Sunday 10 June, 2018
linked from index.html#FORTRAN
March 19 a 1401 has been found, in Amsterdam, Netherlands
Jan 28 Marc purchased an IBM 728 Mod 1 backplane (from Ireland?).
The cards from this backplane are available as spares. More than 11 card types used in our 1401 systems now have spares.

Truncated here :-))


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