SACKA container generally used to transport flat-size mail, parcels, and loose pack mail. It is made
of sewn fabric (usually nylon, polyester, canvas, or plastic with an opening at one end) and is closed
with a draw cord and fastener. In mail processing or dispatch functions, to place mail in a sack.
SERVICE STANDARDSA stated goal for service achievement for each mail class.
SERVING POSTAL ACTIVITYThe military or civilian post office or unit that provides postal
SPECIAL ROUTINGMail routing that requires special or unusual arrangements by the mail routing
STAMP VENDING MACHINE (SVM)A vending machine that has multiple modules capable of
dispensing varying quantities of stamps from a coil from each module.
STANDPOINT SCHEMEA scheme used by an international exchange office for the labeling and
routing of international mail.
UNIT MAILROOM (UMR)A room or enclosure with proper security that serves as a place for unit
mail clerks to handle, process, and deliver mail.
UNIT POSTAL OFFICERA member or civilian employee of the U.S. armed forces, or an employee
of a civilian agency, designated by proper authority to supervise the operation of a unit mailroom
UNIVERSAL POSTAL UNION (UPU)An international postal organization that is a specialized
agency of the United Nations. Its 189 member countries form a single postal territory for the reciprocal
exchange of letter-post items.
Its Convention establishes the common rules applicable to the
international postal service and the provisions governing letter-post services.
WORKING MAILMail received by or dispatched from a military post office (MPO) and mail that is
received by a mail control activity (MCA) where mailbags are physically opened and the contents are
distributed, to include bagging outside mail (OSM) when required.
ZIP CODEThe five-digit numerical code of which the first three digits identify the delivery area of a
sectional center facility or a major-city post office serving the delivery address area. The next two (the
fourth and fifth) digits identify the delivery area of an associate post office, post office branch, or post
office station. All post offices are assigned at least one unique 5-digit code. ZIP Code is a USPS
ZIP + 4 CODEThe nine-digit numeric code, established in 1981, composed of two parts: (a) The
initial code: the first five digits that identify the sectional center facility and delivery area associated
with the address, followed by a hyphen; and (b) The four-digit expanded code: the first two additional
digits designate the sector and the last two digits designate the segment. ZIP+4 is a USPS trademark.
POSTAL ABBREVIATIONS AND ACRONYMS
AAArmed Forces Americas
ADCArea Distribution Center
AEArmed Forces Europe
AICAccount Identifier Code