Some courses, typically first and second year courses, run tutorials in the terminal laboratories.
For these tutorials, an entire lab is booked for that course. The booking system may only allow people enrolled in that course to log in (the tutor may impose further restrictions). Such class bookings are different to normal student bookings in that the terminals are reserved for the class for the entire time of the booking. As mentioned below, terminals are only reserved for student bookings for the first 7 minutes.