Editing DOS/360 and successors (section)

===TOS/360===
'''TOS/360''' (Tape Operating System/360, not a DOS as such and not so called) was an [[IBM]] [[operating system]] for the [[System/360]], used in the early days around 1965 to support the [[IBM System/360 Model 30|System/360 Model 30]] and similar platforms.

TOS, as per the "Tape" in the name, required a tape drive. It shared most of the code base<ref name=40Y.mem>{{cite newsgroup|url=https://groups.google.com/d/msg/alt.folklore.computers/RZA6FD27Tc0/-LoIXsOee7gJ|title=DOS/360: Forty years|author=Joe Morris|newsgroup=alt.folklore.computer|date=April 25, 2005|quote=Don't forget TOS, the bastard cousin of DOS.  Either could be generated from the same set of distribution libraries...}}</ref> and some manuals<ref>{{cite web|url=http://www.bitsavers.org/pdf/ibm/360/dos/GC24-5030-8_Disk_and_Tape_Operating_Systems_Concepts_and_Facilities_Oct70.pdf|title=IBM System/360 Disk and Tape Operating Systems Concepts and Facilities|date=October 1970|id=GC2ij-5030-8}}</ref><ref>{{cite web|url=http://www.bitsavers.org/pdf/ibm/360/dos/GC24-3465-8_DOS_and_TOS_Utility_Programs_R26.1_Aug73.pdf|title=DOS and TOS Utility Programs|date=August 1973|id=GC24-3465-8}}</ref> with IBM's DOS/360.

TOS went through 14 releases, and was discontinued<ref>{{cite mailing list|url=https://www.mail-archive.com/ibmvm@listserv.uark.edu/msg24371.html|author=Anne and Lynn Wheeler|title=Re: IBM 1401|date=May 28, 2009|mailing-list=ibmvm@listserv.uark.edu}}</ref>{{failed verification|date=July 2019}} when disks such as the [[IBM 2311]] and [[IBM 2314]] became more affordable at the time of System/360,<ref>{{cite magazine|magazine=Computerworld|date=September 5, 1977|volume=11|issue=36|pages=39–40|title=IBM Feared Competition to 360/30 CPU|url=https://books.google.com/books?id=nAq5oP06EfEC&pg=PA39}}</ref>{{failed verification|date=July 2019}} whereas they had been an expensive luxury on the [[IBM 7090]].