I'll add to this list as things come up but don't hesitate to leave a comment if you have any questions...
Alhamdulillah or Alhumdillila - Arabic phrase meaning "Praise to God"
A.S.P. - Assistant Superintendent of Police
B/C and B/C"I" - British Constable and British Constable Intelligence
P/Cpl - Palestinian Corporal
T.A.C. - Temporary Additional Constable - local officers drawn predominantly from the Jewish community
Taggart or Tegart - The concrete fortress style police stations designed by Sir Charles Tegart