This was a batch operating system, although there was a variant that allowed interactive access called MultiJob.
2.
Instead it runs on top of an IBM batch operating system ( OS / 360, SVS, MVS ).
3.
The operating system was George 1 * ( a modification of George 1S batch operating system ) running on top of the UDAS Executive.
4.
In addition, NEL developed NELOS, a batch operating system which provided input-output for magnetic tapes, printers, and telecom equipment, provided sequenced compiling of jobs, and a symbol library permitting linking of very large computer applications and executing them on-line.
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