 
 <prompt> text: ```POSIX na abbreviation for The Portable Operating System Interface wey be family of standards wey IEEE Computer Society specify for make sure say compatibility dey between different operating systems. POSIX define the application programming interface (API), along with command line shells and utility interfaces, for software compatibility with variants of Unix and other operating systems.

Originally, the name "POSIX" refer to IEEE Std 1003.1-1988, wey dem release for 1988. The family of POSIX standards formally dey designated as IEEE 1003 and the international standard name na ISO/IEC 9945.

The standards come out from project wey start around 1985. Richard Stallman suggest the name "POSIX" to IEEE instead of former "IEEE-IX". The committee see am as easier to pronounce and remember, so dem adopt am.

Unix na the basis wey dem choose for standard system interface partly because e no dey tied to any manufacturer. But, plenty major versions of Unix dey exist—so dem need to develop one common system. The POSIX specifications for Unix-like operating systems originally dey one document for the core programming interface, but e later grow to 19 separate documents (POSIX.1, POSIX.2, etc.). The standardized user command line and scripting interface dey based on the UNIX System V shell. Many user-level programs, services, and utilities (including awk, echo, ed) also dey standardized, along with required program-level services (including basic I/O: file, terminal, and network). POSIX also define one standard threading library API wey most modern operating systems support. For 2008, most parts of POSIX combine into one single standard "(IEEE Std 1003.1-2008", wey also dey known as "POSIX.1-2008)."

Answer the following questions:
1. wetin POSIX stand for?
2. wetin e define?
3. wetin POSIX be?
4. na who?
5. wetin be the purpose of the standards?
6. when the standards start?
7. from wetin?
8. who come up with the name?
9. wetin e bin dey called before?
10. why dem decide to go with new name?
11. which OS dem choose as foundation for the standard interface?
12. why?
13. how many versions dey exist?
14. for 2008, wetin dem combine the parts into?
15. wetin e be named?
16. wetin else dem call am?
17. how many documents the original system contain?
18. wetin e increase to?
19. wetin the systems be named?

Numbered answers:``` <response>: ```1. Portable Operating System Interface
2. Di API, command line shells and utility interfaces, for software compatibility
3. A family of standards
4. Di IEEE Computer Society
5. To maintain compatibility between operating systems
6. Circa 1985.
7. A project wey start dat time
8. Richard Stallman
9. IEEE-IX
10. E dey easy to pronounce and remember
11. Unix
12. E no dey tied to any manufacturer
13. Several major ones
14. A single standard
15. IEEE Std 1003.1-2008
16. POSIX.1-2008
17. One
18. 19
19. POSIX.1, POSIX.2, etc.``` 