Shulou(Shulou.com)06/01 Report--

Today, I will talk to you about the example analysis of the development history of Unix. Many people may not know much about it. In order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.

With the development of computers, the performance of CPU has been very strong, but the performance of other devices is far from that of CPU (for example, the frequency of memory and CPU,CPU can reach 3GHZ/s, while memory can only reach 1600HZ/s). Early computers are single-task computers, so that the performance of CPU is not wasted, so there are institutions to study multi-tasking systems.

In 1964, Multics, jointly developed by Bell Labs, Massachusetts Institute of Technology and General Electric of the United States, was an operating system installed on a mainframe to support multi-person and multi-tasking.

# the first customer is Ford, which needs to be verified

In 1969, Bell Labs withdrew from Multics. Ken Thompson, a researcher at Bell Labs, wrote a Space Travel game after Multics was stopped. In order to run its own Space Travel,Ken Thompson, I wrote an operating system in B language (which belongs to assembly language), which ran on PDP 7 produced by DET (the mainstream at that time was PDP 11). The operating system is UNICS.

Around 1972, Ken Thompson and Dennis M.Ritchie worked together to design the C language.

In 1973, Ken Thompson and Dennis M.Ritchie rewrote UNIX in C

The Bell nroff program of Bell Labs needed an operating system to run, so it used UNIX.

In 1974, Ken Thompson and Dennis M.Ritchie jointly published a paper in American computer Communications, UNIX

And then made public. Due to copyright issues, AT&T faces an antitrust investigation, resulting in Bell Labs having to sell UNIX for free.

For universities and research institutions.

In 1978, SCO released a commercial version of Unix

In 1979, AT&T released system. The name of UNIX is system.

In 1980, Microsoft was founded.

-University of California, Berkeley, Bill, 喜悦 and others jointly founded BSRG

In 1977, BSD

In 1980, DARPA began to develop

In 1983, BSD Unix was the first operating system to support TCP/IP

-BSD Unix is an important branch of Unix history.

In 1985, Richard Stallman launched the GNU campaign. GNU: GNU is not unix

GPL:General Public license

FSF: Free Software Foundation

Note: X-Windows is the first software to support the GNU program

Gcc:gnu c complier

Vi:visual interface

The main branches of Unix are:

1 、 Sun:Solaris

2 、 IBM:AIX

3 、 HP: HP-UX

In 1987, after the copyright dispute between Bell Labs and BSD about Unix, for the convenience of teaching, Dutch professor Andrew S.Tanenbaum wrote a Unix-like MINIX. Note: MINIX is non-free software.

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