Target: People typically enter, when coming out of college, at a lower grade in the GS-5/7/9 area with a target position of one of GS-11/12/13. IT (not CS) folks were often in GS-11 targeted positions, computer scientists and engineers often in GS-12 positions. They'd get promoted in two grade increases (5 to 7, 7 to 9, 9 to 11) or one grade increases (11 to 12, 12 to 13) until they hit their target grade. At a rate of either one increase per year or per 6 months depending on when they got hired, by what agency, and in what role. An IT person, usually one increase per year; engineer, typically two increases per year. Computer scientists usually got screwed and got one increase per year which meant you had fewer of them wanting to work for the government (they also, at that time, rarely got signing bonuses). This leaves a lot of the software shops in DOD (where I had experience) mostly filled with aerospace and electrical engineers.

"Cyber" roles (security; which could be a couple different job series) in some agencies jumped up faster or had a higher target grade due to the need (or perceived need) for more people.