What does APOC stand for?

Advance Post Office Check - Bureau of the Census (GFGA)

Aerial Port Operations Center

Alaska Public Offices Commission (SAUO)

Anglia and Prefect Owners' Club - British (BI)

Anglo-Persian Oil Company (SAUO)

Army Point of Contact (AABC)

Army Post Office Corps - British military (DMA)

Association of Postal Officials of Canada

Apocalypse

Apocalypse of John - Biblical (RION)

Apocalyptic (BJA)

Apocrypha (BJA)