Security rating determines the level of access from information points. In addition are several special identifiers; 'OO Medic Droid', 'A1 Automaton', 'ST Programmer' and 'AB Andrewoid'. (The last two being plays on Steve Turner and Andrew Braybrook's names.)
Security clearance determines the extent of access to information systems. Furthermore, there are distinctive labels such as 'OO Medic Droid', 'A1 Automaton', 'ST Programmer' and 'AB Andrewoid'. (The last two being puns on Steve Turner and Andrew Braybrook's names.)