Each student's computer account is allocated a number of booking tokens which are needed to make bookings. Each token gives the right to make a booking for one half hour period in one of some selection of labs. The selection of labs you are allowed to book depends on which courses you are enrolled in. After this booking has been utilised or cancelled by either yourself or the booking system (see section 1.5.4 on page Taking Up Your Booking), the token is returned so that further bookings can be made.
Each student is given a number of tokens based on the expected assignment load of the courses that they are enrolled in. Courses with a heavier load will be given more tokens, and so students in those courses (who book) will get a correspondingly greater share of available terminal time.
You can find out how many tokens you have by typing tokens at the BOOK > prompt. You can also find out in the tkbook application by clicking on the tokens drop down menu or similarly by typing tokens at the BOOK > prompt within the interface.Loc Van Huynh 2007-03-15