On 6/25/20 1:55 PM, Tom Gardner via cctalk wrote: > I'm trying to figure out what were the earliest Type numbers for 3M ½-inch > reel-to-reel computer tape > > As best I can find, 3M began marketing a Type 777 computer tape about 1967. > The Type 700 appears to be somewhat later. But 3M sold computer tape > directly to at least government customers (e.g. NSA, Social Security) in the > 1950s. The also notably OEMed tape to IBM who rebranded it under an IBM > label until the late 1960s at which point with the help of Sony IBM began > manufacturing its own computer tape. > > Anyone have any idea of the Type number for 3M computer tapes earlier than > Type 777? > > There might be a place for some of these older Types at the CHM if anyone > knows of any still in existence. > > Tom > > PS: There is a lot of information on 3M audio tape Type numbers as at > http://www.aes.org/aeshc/docs/3mtape/aorprod-cust.pdf but computer tape seems > to be an orphan I probably do--but I'm going to have to look through my logs. Old 3M tape is terrible for binder that sticks to everything. Before processing the stuff, I have to lubricate it.
--Chuck
