I've seen initials used too, which is at least a nice hint; but the case I based the example on conjured these characters essentially at random. The real kicke

I've seen initials used too, which is at least a nice hint; but the case I based the example on conjured these characters essentially at random. The real kicker was that they were forced upon users in Unix environments who had been using CVS, Subversion, etc. and went from seeing useful log messages like "changed by jsmith" to aggravating ones like "changed by rjx133".