IO

IO

1. (international standards) ISO 3166-1 alpha-2 country code for the British Indian Ocean Territory.

   Synonym: IOT (alpha-3)

IO (countable and uncountable, plural IOs)

1. (computing, electronics) Initialism of input and output.

   Alternative form: I/O

2. (grammar) Initialism of indirect object.
3. Initialism of intelligence officer.
4. (Singapore, law enforcement) Initialism of investigation officer.
5. (international law) Initialism of international organization.

IO

1. (emergency medicine) Abbreviation of intraosseous.

• -oi, OI, Oi, oi, oi!

IO

1. Initialism of in Ordnung (“all right”).