In Chapter 1, I mentioned that the fi rst version of Unix was developed by Ken Thompson, so he could run a program called Space Travel. In this chapter, I explained that the first program to use Termcap (terminal information database) and curses (terminal manager interface) was a text-based fantasy game called Rogue, written by Michael Toy and Glenn Wichman. Creating a new operating system and experimenting with a brand new set of interfaces are both extremely time-consuming, diffi cult tasks. What do you think motivated Thompson and, later, Toy and Wichman to take on such challenging work for what seem to be such trivial reasons? If you were managing a group of programmers, what motivations do you think they would respond to (aside from money)?