[thedufer]

> you actually need to get a service ticket (TGS)

If we're being pedantic, TGS ("ticket granting server") is the service you get service tickets from. Service tickets are (occasionally) abbreviated ST, as you'd expect. The TGS is a logical part of the KDC, distinguished from the AS which grants TGTs.

[Graphon1]

Kerbernerd revealed.