1. DOS 6.22
2. notepad.exe
3. deltree.exe
4. format.exe
5. Lotus 123
6. Pong
7. The 437 Boot virus
8. NMap
9. mIRC
10. Napster
11. pkzip/pkunzip
12. MS-DOS Editor

There you go. 12 best pieces of software ever.

What's all this BS about shuttle launches, they managed to blow up the shuttle twice with that =P