TSS*
TSS are the first three characters of Computer Associates International product, Top Secret. Top Secret secures MVS, VM, and VSE operating systems; associated support subsystems; and applications and files on IBM mainframes. It also provides MVS administrative security control for Digital VAX/VMS systems.
Reference Sources
Datapro Reports on Software, McGraw-Hill, Incorporated, Performance Monitors & Security Systems, March 1991.
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