491: Postal Service
The Postal Service subsector includes the activities of the National
Post Office and its subcontractors in delivering letters and small
parcels. These articles can be described as those that can be handled
by one person without using special equipment. This allows the
collection, pick-up, and delivery operations to be done with limited
labor costs and minimal equipment. Sorting and transportation
activities, where necessary, are generally mechanized. The restriction
to small parcels distinguishes these establishments from those in the
The traditional activity of the National Postal Service is
described in this subsector. Subcontractors include rural Post
Offices on contract to the Postal Service.
Bulk transportation of mail on contract to the Postal Service is not
included here, because it is usually done by transportation
establishments that carry other customers' cargo as well.