If you want authoritative sources I highly recommend: * IBM J. RES. DEVELOP. • VOL. 25 • NO. 5 • SEPTEMBER 1981, has an article “Innovations in the Design of Magnetic Tape Subsystems”
* IBM Journal of Research and Development Vol. 47, No. 4, July 2003 has an article “Fifty years of IBM innovation with information storage on magnetic tape” * Magnetic Recording, the First 100 Years, Daniel et al, Chapter 17, Data Storage On Tape * Magnetic Recording, Vol II: Computer Data Storage, Mee et al, Chapter 4 Data Storage * The Complete Handbook of Magnetic Recording, Jorgensen, Parts 4 and 5 which deal with tape materials and transports The first ref above gives the date of IBM’s shipment of 6250 bpi as 1973, AFAIK that became the industry standard for ½ r-t-r tape I have all of the above in my library and might be able to help u off line if you have specific questions. I’ve worked on tape articles in Wikipedia and they are for the most part pretty good. If u find any errors or omissions I hope u will update If you are willing and able to share I’d like to see yr results Good luck Tom -----Original Message----- From: Zane Healy [mailto:heal...@avanthar.com] Sent: Tuesday, March 07, 2023 5:05 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: [cctalk] Age of Tape Formats? I�m working on a project, and I need to know the age of various tape formats. For example when were 6250bpi 700� 9-Track tapes or DC600A cartridges introduced? Is there any good resource online that documents this? Wikipedia is of some help, but the older you go, the spottier it is. Zane
