VCR : Video Cassette Recorder
DVD : Digital Video Disc
ID : Identification
ATM : Automated Teller Money
lbs : pounds ( when you're giving weight of some thing.)
ICAO : International Civil Aviation Organization
SAVAK : Sazeman-e Aettela'at Va Amniyat-e Keshvar,in English : National Intelligence and Security Organization
UNESCO : United Nations Education , Scientific and Cultural Organization
ad : advertisement
ext : extension