* Multics Systems: A system developed in collaboration with Bell (Laboratory of clinical practice), MIT (Massachusetts Institute of Technology), and Ge (US universal electronics;
* 1969: K. Thompson replaced Dec with a simple File System system, the predecessor of UNIX, but the Unix word has not yet appeared
* 1973: Bell's d. Richie modified Thompson's minor systems in the C language, all of which were modified in the ASCII case for ease of application! This is the first time that the UNIX operating system name appears. However, UNIX is set for different hardware, therefore, it is displayed on a large server! After several years, there are the following editions:
1. System V comes from ATT;
2. BSD came from the California Institute of Technology;
3. AIX from IBM
** 1979: Richard Stallman advocates open source;
** 1984: GNU and Free Software Foundation (FSF) are promoted by R. Stallman;
* 1986: xfree86 appeared on UNIX and was integrated into Linux in 1994!
* 1991: Linus Torvalds, A fenghuo university student, first announced the 0.02 version of Linux kernel on the network, which was named Hoby.
