 
 <prompt> text: ```DOS na family of disk operating systems wey mainly consist of MS-DOS and a rebranded version wey dem call IBM PC DOS wey dem introduce for 1981, plus some later compatible systems from other manufacturers like DR-DOS (1988), ROM-DOS (1989), PTS-DOS (1993), and FreeDOS (1998). MS-DOS dey dominate the x86-based IBM PC compatible market between 1981 and 1995.

Plenty other operating systems dey wey also dey use the acronym "DOS", including the mainframe DOS/360 wey start for 1966. Others na Apple DOS, Apple ProDOS, Atari DOS, Commodore DOS, TRSDOS, and AmigaDOS.

IBM PC DOS (and the one wey dem dey sell separately as MS-DOS) and its predecessor, 86-DOS, resemble Digital Research's CP/M—the dominant disk operating system for 8-bit Intel 8080 and Zilog Z80 based microcomputers. DOS instead dey run on Intel 8086 16-bit processors. Starting with MS-DOS 1.28 and PC DOS 2.0 the operating system incorporate various features wey dem get from Xenix, Microsoft's variant of Unix.

When IBM introduce the IBM PC, wey dem build with the Intel 8088 microprocessor, dem need an operating system. Dem come dey find 8088-compatible build of CP/M, IBM first approach Microsoft CEO Bill Gates (possibly because dem believe say Microsoft get CP/M because of the Microsoft Z-80 SoftCard, wey allow CP/M to run on an Apple II). IBM come dey sent go Digital Research, and dem set up meeting. But the initial negotiations for the use of CP/M break down; Digital Research wan sell CP/M on royalty basis, while IBM dey find single license, and to change the name to "PC DOS". Digital Research founder Gary Kildall refuse, and IBM come withdraw.

Answer the following questions:
1. which processor IBM use for their PC?
2. who IBM first approach?
3. why dem talk to am?
4. which card fit don give that impression?
5. wetin e do?
6. wetin DOS stand for?
7. name 2 main versions?
8. when dem introduce dem?
9. which market MS-DOS dominate?
10. which years?
11. which year FreeDOS launch?
12. wetin launch for 1988?
13. which mainframe OS dey use the acronym?
14. how many Apple versions dey?
15. name one

Numbered answers:``` <response>: ```1. 16-bit
2. Bill Gates
3. possibly dey believe say Microsoft get CP/M
4. the Microsoft Z-80 SoftCard
5. allow CP/M to run on top Apple II
6. disk operating systems
7. MS-DOS and IBM PC DOS
8. for 1981
9. the x86-based IBM PC compatible market
10. 1981 and 1995
11. 1998
12. DR-DOS
13. DOS/360
14. Two
15. Apple ProDOS``` 