-
Unix (1970s)
- operating systems
- developed at the Bell Labs
- influenced many modern operating systems
-
Unix-like Operating Systems
- behaves in a manner similar to a Unix system
-
GNU (1983)
- Unix was a proprietary operating system
- The goal was to bring a wholly free software operating system into existence
- an operating system and an extensive collection of computer software
- a recursive acronym for "GNU's Not Unix!"
-
POSIX (1988)
- Portable Operating System Interface
- IEEE Std 1003.1-1988
-
MINIX (1987)
- Unix-like, POSIX-compliant OS
- Based on a microkernel architecture.
- Open source
- Free for educational usage
-
Linux (1991)
- Unix-like, POSIX-compliant
- Based on the monolithic Linux kernel
- Free for commercial as well
### References
