LO
- lo – (s) Lao language (ISO 639-1 code)
- LO – (s) Slovakia (FIPS 10-4 country code)
- LOA – (i) Limit Of Advance
- LOC – (a/i) Level of Operational Capability – Limited Operational Capability – Lines Of Code – Lines Of Communication – see entry
- LOD – Limit of Detection – see Detection limit
- LoD – (i) Lines of Development (UK)
- LOFAR – (p) Low Frequency Analysis and Recording
- LOGPAC – (p) Logistics Package
- LOL – (i) Laughing Out Loud (Internet short-hand)
- LOMEZ – (p) Low Altitude Missile Engagement Zone
- LONEOS – (a) Lowell Observatory Near-Earth-Object Search
- loq – (p) loquitur (Latin, "(s) he speaks")
- LORTID – (p) LOng Range Target IDentification
- LOS – (i) Line Of Sight
- LOSAT – (i) Line-Of-Sight Anti-Tank (missile)
- LOTA – (i) Licentiate of the Orthodontic Technicians Association
- LOTIS – (a) Livermore Optical Transient Imaging System
- LOTR or LotR – (a) Lord of the Rings
- LOTS – (a) Logistics Over-The-Shore
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