Term "C of T" meaning

[Turn&Burn]

A slight moment of stupidity,

Could someone please advise me of the meaning of "C of T" ,
"AFI" and "QFI".

Merci!

[DB6]

Certificate of Test
Assistant Flying Instructor - no longer in use, replaced by FI(R) under JAR
Qualified Flying Instructor - military term meaning an instructor who has attained an RAF instructional category awarded by CFS.

FI(R)= Flight Instructor (Restricted)
JAR=Joint Aviation Regulations
CFS=Central Flying School
RAF= you'd better know what that means!