Enc: abbreviation for enclosure; addenda for business letter
bis
This is called a DBA.
buss.
as per all-acronyms.com, the abbreviation of partners are: PRN, P, Pa, PRtnR.
The Better Business Bureau is also known by the abbreviation of BBB .
pss
Re:
Addenda's
The plural form of addendum is addenda
This means that there is some form of enclosure with the letter--a resume, a statement, a brochure, a survey, etc.
There is not a three letter abbreviation for Kiev. It is a two letter abbreviation which is KV. The abbreviation is typically used when booking airline travel.
bis
This is called a DBA.
the abbreviation is T
Ry is the 2 letter abbreviation for Riyadh.
AB is the 2-letter abbreviation for Alberta.
The two-letter abbreviation for the Philippines is PH.