- Unix was developed by Ken Thompson at Bell Laboratories, a division of AT&T, in 1969.
- Linus Torvalds was born in a Swedish-speaking family in Helsinki, Finland, in 1969.
- C programming language was created by Dennis Ritchie in 1970.
- Unix 7th edition was released in January 1979.
- 3BSD (Berkeley Software Distribution), the first full distribution of BSD, was released in December 1979.
- System III, produced by AT&T’s Unix Support Group, was released in 1981.
- System V followed in 1983.
- Richard Stallman founded the Free Software Foundation (FSF) to support the GNU (GNU is not UNIX) project.
- System V Release 4 (SVR4) was released in 1989.
- Unix variants in the 1980s: Sun’s Solaris, IBM’s AIX, HP’s HP-UX, NeXT’s NeXTStep, Apple’s A/UX, and SCO’s XENIX.
- Minix, as a tool for teaching OS, was developed in 1987 by Andrew Tanenbaum, a university professor in Holland.
- The initial Linux Kernel 0.02 was announced in the comp.os.minix Usenet newsgroup by Linux Torvalds on October 5, 1991.
- The first release of Linux Kernel version 1.0 was in March 1994.
- The latest release of the Linux Kernel is 6.7.1 as of January 25, 2024.
