| Term | Definition |
| express | fastes and guaranteed delivery |
| priority | handling and expedited delivery for materials up to 70lbs |
| first class mail | letters postcards stamped cards greeting cards checks money orders |
| periodicals | applies only to printed materials from publishers and registered news agents approved |
| standard mail a | used by retailers, catalogers and other advertisers to promote products and services |
| standard mail b | used for parcels weighin 11 lbs or more |
| certificate of mailing | show evidence something was mailed and a deadline was met |
| restricted delivery | mail can be delivered to a specific addressee or someone authorized to receive mail for that addressee |
| information sheets (is) | helps to reinforce what you have explained verbally |
| interoffice communication (ioc) | office inform the staff or a policy or decision |
| informal notes (in) | congratulations thank you's |
| personal letters (per let) | personal correspondence such as travel agencies, mail order catalogs clothing suppliers |
| professional letters (pro let) | contact professional colleagues |
| buisness letters (bl) | correspond with professional associations |