I am crp11, yet there are only 6 crp's, the highest of which is crp19. (The table below claims 8; again, the data is imperfect.) What happened to the missing crp's? crp1 through crp10 are absent, and so are crp12 through crp16. It's conceivable that some of them have graduated, but first of all, this method of giving e‐mail addresses has not been around very long, and second, I doubt that crp's 12 through 16, who apparently entered Pitt at the same time as me (or after), have all graduated and been removed from Pitt's system in less than four years. My best guess is that Pitt sets aside usernames for everyone they have accepted and simply doesn't create those for people who choose not to come here. Pitt claims that about 33% of accepted students enroll, so 6 enrolled crp's out of roughly 19 total usernames set aside would seem to fit that hypothesis.

How do we get three letters for a username if a person has no middle name? The answer, it appears, is to take the first two letters of the person's first name in combination with the first letter of his last name. Of the people with no middle name but a standard‐ish username that I found, almost all of them fit into this pattern. A few do have usernames with only two letters, but I think these are anomalies; many people with Pitt usernames, including, presumably, graduate students, get to choose their own usernames, and that may well be the reason for these people's usernames. In the table below, I list the usernames of all people I found with no middle name but a normal‐looking username. I've marked the first two letters of the names of those who follow the pattern I've described, and I've also drawn attention to a few others with usernames containing three letters who do not follow the pattern. Remaining are those with only two letters in their usernames, one guy with an old‐style "st" username (all student usernames used to contain "st"), and perhaps some others I'm forgetting.