Do you mean a prompt desk (as we call it in the UK)?
If so, surely it's best to design one to your needs - someone could have needed 20 cue lights, paging to 12 different parts of Backstage and FOH, 3 monitors, 4 clocks, a speaker, a computer and space for a script, but unless you also need all that, then it's going to be really overkill.
However, most I've seen have about 12-16 cue lights, a paging mic (to either Backstage or FOH or both), space for a script and storage. Maybe a monitor is built in, but some just have them sat on top.
HTH,
Chris