On 10/30/2015 10:38 AM, Jerome H. Fine wrote:
There was no operating system, just a batch stream of one job at a time. All I/O was via a 1401 for both input and output.
IBSYS and/or FMS don't qualify as operating systems? The usage of the 1401 to do unit record I/O was the original application of the term "SPOOL". Many use the term today, uncapitalized, without realizing that it's an acronym.
--Chuck