Current series since 1978. Vehicles from embassies have a code number for the Embassy, (052 = Guinee Bissau) CMD, CD or IT, and then a serial number, with leading zeros when under 100.

CD – Diplomatic Staff
CMD – Head of Mission
IT – Non-diplomatic Embassy Staff

008 = USA

Current series: vehicles from International Organizations have the Embassy or organization code followed by a serial and then CMD, CD or IT.
OP = P.L.O.  (OP is now replaced by OLP)