Shulou(Shulou.com)06/02 Report--

Computer and operating system

ENIARC: von Neumann system

CPU: arithmetic unit, controller, register, cache

Memory: memory, RAM (Random Access Memory)

Input: give instructions, provide data, etc.

Output: output results after data processing

Program: instruction + data algorithm + data structure procedural programming language: sequential execution: loop execution n times: select execution: perform only one branch of multitasking: multi tasks Bell,MIT,GE = Multics Ken Thompson:Space Travel DEC:PDP-11,VAX (VMS) PDP-7: Assembly language 1969: Unics = Unix Unix: 1972 Nroff 1972 AT&T:System Unix Magi 10 B language: Dennish Ritch,C language "American computer Communications": 1974, first made public by AT&T:System V7 1979: SCO 1980: Microsoft,XENIX Berkeley:Ken,Berkeley Bill Joy,BSRG, 1977, BSD (Berkeley System Distribution) 1980, DRRPA,TCP/IP stack 1981, Microsoft Bill Gates SCP:QDOS (Quick and Dirty Operating System) Windows Windows NT (new technology) DOS 2.0, CP/M 1990: Microsoft development environment Unix SUN:Bill 喜悦 workstation Apple: XEROX: PARK (star) 1985: Richard Stallman GNU:GNU is Not Unix. GPL: General Public License FSF: Free Software Foundation X-Window: GPL gcc: gnu c complier vi: visual interface. Free: freedom Unix: SUN: Solaris IBM: AIX HP: HP-UXAndrew: Minix, 4000 + lines of code System V Unix BSD 1990: BSD, Jolitz, porting to x86 platform, 386-BSD migration aborted in 1991, restart in 1992: Linux Torvalds announced the establishment of Linux in accordance with GPL protocol Larry Wall: diff, patch

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