obso - on-s
- official invitation
- official journal
- official journal of the conference
- official language
- official languages of the United Nations
- official letter
- official line
- official links
- official list
- official occasions
- official opposition
- official part
- official pass
- official policy
- official poverty level
- official poverty wages
- official powers
- official press
- official pronouncement
- official propaganda
- official protest
- official quotation
- official rate
- official rate of pay
- official reaction
- official recognition
- official record
- official records of the conference
- official relations
- official religion
- official report
- official representative
- official reserves
- official residence
- official responsibilities
- official results
- official returns
- official secret
- official spokesman for the talks
- official statement
