Typewriters come in two varieties: Grey and Brown . For all intents and purposes, both types of Typewriters are exactly the same as far as gameplay is concerned. Typewriters always have the same orientation, and are never found adjacent to a wall.
Typewriters may be bugged, assuming Max has at least one Bug left in his inventory. To do this, walk up to the Typewriter and press the "F3" key to install the bug. Remember that only one Bug may be installed in each room.
Typewriters are normally a good location to place a Bug. You will only get a +4% Surveillance Quality bonus for bugging a Typewriter in an Office, but you can get +6% for bugging a Typewriter in a File Room. Therefore they are the second best furniture to bug aside from Computers .
You can hide behind a Typewriter when crouched, and can also jump over it if necessary.