See LASORS Appendix A to Section A pages 1, 3 and 6:
AFI - Assistant Flying Instructor
FI - Flight Instructor
FI(R) - Flight Instructor (Restricted)
FIC - Flight Instructor Course
FIE - Flight Instructor Examiner
QFI - Qualified Flying Instructor (Military)
QSP(A) - Qualified Service Pilot (Aeroplanes)