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Originally MS-DOS was designed to be an operating system that could run on any computer with a 8086-family microprocessor.It competed with other operating systems written for such computers, such as CP/M-86 and UCSD Pascal.
TOS/360 (Tape Operating System/360, not a DOS as such and not so called) was an IBM operating system for the System/360, used in the early days around 1965 to support the System/360 Model 30 and similar platforms. TOS, as per the "Tape" in the name, required a tape drive. It shared most of the code base [4] and some manuals [5] [6] with IBM's ...
PDP-6 Monitor OS/3x0 FS: IBM: 1964 OS/360: Level-D DEC: 1968 TOPS-10: George 3 ICT (later ICL) 1968 George 3: Version 6 Unix file system (V6FS) Bell Labs: 1972 Version 6 Unix: RT-11 file system DEC: 1973 RT-11: Disk Operating System GEC: 1973 Core Operating System CP/M file system: Digital Research (Gary Kildall) 1974 CP/M [1] [2] ODS-1: DEC ...
IBM System/360: IBM OS/360 and CP-67/CMS: Assembler G: University of Waterloo [1] Free IBM System/360 and others (table-driven) IBM OS/360 and CP-67/CMS: IBM Assembler H: IBM — Proprietary: IBM System/360 and System/370: IBM OS/360 and successors: IBM Assembler XF IBM: Free IBM System/370: numerous PL/360: Niklaus Wirth: Yes Free IBM System ...
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[26]: 110 The Basic Assembler is a slightly more restricted version of System/360 Basic Assembler; [27] notably, symbols are restricted to four characters in length. This version is capable of running on a system with 4 KB memory, and macro support is limited to IOCS macros. The card versions are two-pass assemblers that only support card input ...
On the 360/85 [9] and 360/195 [10] there are also extended precision floating point numbers stored as quadwords. For all three formats, bit 0 is a sign and bits 0-7 are a characteristic (exponent, biased by 64).
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