 
 <prompt> text: ```Unix (; trademarked as UNIX) na family of multitasking, multiuser computer operating systems wey come from the original AT&T Unix, wey development start for the 1970s for Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

Initially e dey meant for use inside the Bell System, AT&T license Unix to outside parties from the late 1970s, wey lead to different academic and commercial variants of Unix from vendors like University of California, Berkeley (BSD), Microsoft (Xenix), IBM (AIX) and Sun Microsystems (Solaris). AT&T finally sell their rights for Unix to Novell for early 1990s, wey later sell their Unix business to the Santa Cruz Operation (SCO) for 1995, but the UNIX trademark pass to the industry standards consortium The Open Group, wey allow the use of the mark for certified operating systems wey dey compliant with the Single UNIX Specification (SUS). Among these na Apple's macOS, wey be the Unix version with the largest installed base as of 2014.

From the power user's or programmer's perspective, Unix systems dey characterized by a modular design wey sometimes dem dey call the "Unix philosophy", meaning say the operating system provide a set of simple tools wey each one dey perform a limited, well-defined function, with a unified filesystem as the main means of communication and a shell scripting and command language to combine the tools to perform complex workflows. Aside from the modular design, Unix also dey distinguish itself from its predecessors as the first portable operating system: almost the entire operating system na written in the C programming language wey allow Unix to reach numerous platforms.```

Numbered questions:``` <response>: 1. Wetin OS dey the article about?
2. Wetin e be?
3. E come from where?
4. When dem allow other people work on their OS?
5. Dem get different versions?
6. How dem dey different?
7. Who release some versions?
8. Wetin dem name their flavor?
9. Who else?
10. Wetin dem call theirs?
11. Anybody else?
12. Wetin dem name their flavors?
13. Who buy the rights from the phone company?
14. When?
15. Dem resell am?
16. When?
17. Who buy am?
18. Na acronym?
19. Wetin e mean?
20. As of 2014 which flavor get the largest install base? 