[NCjim]

We used to use the accumulators in the 407 to punch sequence numbers in columns 73-80 on the 514... 'real programming'

[Vermonter]

When I first encountered the 370, it was used as a host for refurbed 360s which had been modified as tester controllers. Each 360 had a full compliment of drives, printer, punch/reader and all the controllers and modified CROS for controlling the test hardware which was a 360 CPU frame modified with the tester logic boards.