which one of the following doesnt have processor?

Question

Mainframe
PC
PDA
Terminal

Answer 1

Now there's clearly an out-of-date homework question. In Ye Olde Days, the terminal didn't use to have a processor in it. However, every since about the VT100, H19, LSI ADM3A days, there's a microcontroller in the terminal.

Interestingly, by the time the PDA was added to the question, the Terminal was already obsolete. ;-)