EddyHawk's Info List
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Operating System Hall of Fame
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CP/M (Control Program for Microcomputers):
-by (Intergalactic) Digital Research
-CP/M-80
-CP/M V2.2
-MS DOS 1.0 is clone of CP/M

DOS: Disk Operating System
-based on CP/M
-many variant:
 .MS-DOS (Microsoft DOS)
  by: Bill Gates/Microsoft (USA)
  V1.0: clone of CP/M
  V2.0 
   string 'MZ' on the beginning of EXE header/MCB/etc is the initial of
    Mark Zbikowski, one of the architects of MS-DOS V2.0
  V4.x
   rumored to be multitask or PM (?) DOS, only distributed on Europe,
    but never proved to be exist
  V6.22: latest independent version
  V7.0x: to support Win9x
  Vx.xx : emulated in Win200x
 .DR-DOS (Digital Research DOS)
  by: Digital Research
  V7.03
   by Caldera?
   supports multitasking
 .Novell DOS
  DR-DOS owned by Novell
 .CalderaDOS/OpenDOS
  by: Caldera
  last DR product line
 .FreeDOS
  by: FreeDOS team
  beta 5
  -min: 8086
  -not 100% MS-DOS compatible
 .PTS-DOS (PhysTechSoft DOS)
  by: PhysTechSoft (Russia)
  2000 [1999]
  -needs 286?
  -most utils written in asm
 .Zenith DOS
  V3.30
 .IBM PC-DOS
  by: IBM
 .Compaq DOS
 .GenSoft Embedded
 .RxDOS
 .Toshiba DOS
 .TI (Texas Instruments) DOS
 .Olivetti DOS
 .DEC DOS
 .Packard-Bell DOS
 .Groupe Bull DOS
 .HP DOS (Hewlett-Packard (?) DOS)
 .AT&T DOS

-many emulators:
 .OS/2 dosbox
 .Linux's DOSEMU
 .NextStep's SoftPC
 .Win2000 dosbox
-many add-ons:
 .4DOS
  by: Tom Rawson & Rex Conn / JP Software (USA)
  year: 1988-1999
  compiler: bp v5 or v5.5
  adv:
   completely replace COMMAND.COM
   enhances many DOS commands and add more commands
   extensive help system
  disadv:
   consumes 3kb basemem + 208kb XMS/EMS/disk (swapping)
   shareware (small delay after exec-ed)
  V5.52A [1996]
  V6.02B [April 1999] last known ver
  variant:
   NDOS (Norton DOS)
   .4DOS licensed to Symantec
   .part of Norton Utilities
 .NewDOS
  year: 1987-1992,1998

OS/2:
-by Microsoft/IBM:
-32 bit OS
-GUI
 V2.0
 V3.0
  1.84mb floppy
 Warp

UCSD p-System:

Unix:
-multi(user/task) OS
-written in C language
-by Ken Thompson & Dennis Ritchie at AT&T Bell Laboratories in 1969
-many variant:
 .BSD: by University California at Berkeley
  variant: FreeBSD, NetBSD
 .Solaris
 .Sparc
 .SCO
 .HP-UX
 .BeOS (?)
 .AT&T System V: by AT&T
 .Linux:
  -32 bit OS
  -by Linus Torvalds
  -most efficient & cheapest Unix variant ?
  -free OS: source-code provided?
  -many variant:
   .Red Hat
   .Suse
-many implementation:
 .AIX: by IBM (to run RISC-based workstation)
 .A/UX: graphical version for Apple Macintosh
 .Mach: rewritten Unix-compatible OS for NeXT computer
 .Linux?

Win32 (Win4+)
-by Microsoft
-GUI
-PE executable format (based on COFF)
-has emulator: SoftWindows

Unknown
-QNX