• noun:   A surname from Japanese.
• noun:   One of the 23 special wards of Tokyo prefecture, Japan.
• noun:   (computing, communication) Initialism of over-the-air.
• noun:   (electronics) Initialism of operational transconductance amplifier.
• noun:   (travel, aviation) Initialism of online travel agency/agent.
• noun:   (aviation) Initialism of on-time arrival.
• noun:   (astronomy) Initialism of optical tube assembly (of a telescope).

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