In viewing the rosters of those who deliver academic instruction at colleges and universities, one discovers a wide variety of appointment types and total numbers of faculty. With the former, what has been surprising is the growth, both in number and variety, in non-tenure track (NTT) lines over the past few decades. The total number is not surprising as it primarily reflects student body size and, to a lesser extent, the number of degree programs available, overall institutional resources, and internal choices regarding faculty work.