Principal Clerk-Typist - Paperbackby Passbooks (Compiled by) The Principal Clerk Typist Passbook(R) prepares you for your test by allowing you to take practice exams in the subjects you need to study. It provides hundreds of questions and answers in the areas that will likely be covered on your upcoming exam, including but not limited to: office record keeping; coding decoding information; organizing data into tables and records; understanding written material; supervision; and more.