/pal/ , n.
a special air service offered by the U.S. Postal Service for sending parcels from 5 to 30 lb. (2.3 to 13.5 kg) to overseas servicemen: only the regular parcel post rate to the U.S. port of shipment plus $1 is charged. Cf. SAM (def. 2).
[ P(arcel) A(ir) L(ift) ]
Police Athletic League.
Also, P.A.L.