IBM Administrative Terminal System

The IBM Administrative Terminal System, also known as ATS/360, provided text- and data-management tools for working with documents to users of IBM System/360 systems.

An earlier version ran on an IBM 1440 or IBM 1460 Data Processing System and the IBM Service Bureau Corporation offered a proprietary version, Call/ATS, which ran on IBM 1440 systems or on IBM System/360 DOS systems.

ATS/360 provided comprehensive text- and data-management tools including entry, temporary storage, permanent storage, formatting, printing, archiving and retrieving. Utilizing ATS/360, a large business could maintain all its end-user documents, revising and printing new versions of these as required. Also using ATS/360, a large law practice could maintain its client files, including witness statements and depositions, and several landmark legal decisions were significantly assisted using ATS/360.

Initially, ATS/360 supported only IBM 2741 typewriter terminals. Later, support was added by user groups for 2741 terminals with the "break feature" and for IBM 1050 terminals (which implicitly incorporatd the "beak feature). The Magnetic Card Selectric Typewriter (MC/ST), which could emulate a 2741, was also supported.

ATS/360 was designed exclusively for IBM 2311 and IBM 2314 direct access storage facilities, for online "Working storage" and "Permanent storage" and for IBM 2400/3400 tape drives, for offline "Rollout/Rollin" (Permanent storage backup/restore) and "Format and print" tapes.

An IBM hardware RPQ provided the IBM 1403 Model N1 printer's TN print train with characters which simulated the IBM Selectric typewriter Courier 72 type ball characters identically, thereby allowing machine printed documents to be manually corrected, or for manually inserted text, as required.

An IBM program RPQ added support for the IBM 3330 direct access storage facility, and this RPQ was applied by most users of ATS/360 which had migrated to early IBM System/370 processors. Essentially, this RPQ replaced each instance of a cannonical Load Halfword (LH) instruction (which implicitly featured "sign extension" from the high-order bit to the remaining 16 bits) with an appended AND instruction, and which eliminated the effect of the high-order bit extension. This, then, allowed for 16-bit disk block addresses, which could later be converted into the expected and required CCHHR format.

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