Related:

• operating system:: [techspeak] n. (Often abbreviated `OS') The foundation software of a machine, of course
  hat which schedules tasks, allocates storage, and presents a default interface to the user between applications....
• CP/M:: /C-P-M/ n. [Control Program for Microcomputers] An early microcomputer {OS} written by hacker Gary Kildall for 8080- and Z80-based machine
  very popular in the late 1970s but virtually wiped out by MS-DOS after the release of the IBM PC in 1981....
• CP/M /C-P-M/ n. [Control Program/Monitor; later retconned to Control Program for Microcomputers] An early microcomputer OS written by hacker Gary Kildall for 8080- and Z80-based machine
  very popular in the late 1970s but virtually wiped out by MS-DOS after the release of the IBM PC in 1981....
• MS-DOS:: /M-S-dos/ [MicroSoft Disk Operating System] n.
  A {clone} of {{CP/M}} for the 8088 crufted together in 6 weeks by hacker Tim Paterson, who is said to have regretted it ever since....
• MS-DOS /M-S-dos/ n. [MicroSoft Disk Operating System] A clone of CP/M for the 8088 crufted together in 6 weeks by hacker Tim Paterson at Seattle Computer Produc
  who called the original QDOS (Quick and Dirty Operating System) and is said to have regretted it ever since....
• exec /eg-zek'/ or /eks'ek/ vt., n. 1. [Unix: from `execute'] Synonym for chain, derives from the exec(2) call.
  2. [from `executive'] obs. The command interpreter for an OS (see shell)...
• exec: /eg-zek'/ vt., n. 1. [UNIX: from `execute'] Synonym for {chain}, derives from the `exec(2)' call.
  2. [from `executive'] obs. The command interpreter for an {OS} (see {shell})...
• operating system n. [techspeak] (Often abbreviated `OS') The foundation software of a machine
  hat which schedules tasks, allocates storage, and presents a default interface to the user between applications....
• Unix is a lot more complicated (than CP/M) of course -- the typical Unix hacker can never remember what the PRINT command is called this week -- but when it gets right down to i
  Unix is a glorified video game. People don't do serious work on Unix system...