Shulou(Shulou.com)06/03 Report--

The content of this article is extracted from the second edition of "Unix Advanced Environment programming". If there are any errors, please indicate, thank you!

Unix Standardization:

1 、 ISO C

2. Portable operating system interface for IEEE POSIX

3. Single Unix Specification single Unix specification, which is an extension of POSIX.1.

4. FIPS federal information processing standard, the influence of this standard on Unix is gradually reduced.

Unix system implementation:

1 、 SVR4

2 、 4.4BSD

3 、 FreeBSD 、 NetBSD 、 OpenBSD

4 、 Linux

5 、 Mac OS X

6 、 Solaris

7. AIX,IBM version of Unix

8. HP-UX,HP version of Unix

9 、 IRIX

10. Unix system derived from Unix ware,SVR4.

Etc.

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