Where Used (for forms only)

The where used column identifies the primary users of a form.

AC	Air Carrier
AE	Air Exchange Office
AM	Airport Mail Facility
AO	Associate Office
AR	Area Office
BC	Bulk Mail Center
CA	CAG A–L Post Offices
CD	Customer Service and Sales District
CE	Facility Service Center
CR	Post Offices with City and Rural Delivery
DN	Distribution Networks Office
HQ	Headquarters
IC	Inspector–in–Charge
MB	Mailbag Depository and Repair Center
MD	Material Distribution Center
MSS	Mailing and Shipping Services
NCS	National Customer Support Center
OIG	Office of Inspector General
PC	Processing and Distribution Center
PE	Postal Employee Development Center
PH	Purchasing Service Center
PO	All Post Offices
PS	Postal Service–Wide
PU	Public
PV	Post Offices with Vehicles
SC	Information Service Center
SD	Postal Source Data System (PSDS) Office
STF	Stamp Fulfillment Services
TC	National Test Administration Center
VM	Vehicle Maintenance Facilities
XO	Surface Exchange Offices