According to http://www.acronymfinder.com LEO has 28 acronyms and can stand for (ranging from most popular to least popular):
LEO Low Earth Orbit
LEO Leopard (German tank)
LEO Law Enforcement Officer
LEO Law Enforcement Online
LEO Link Everything Online
LEO Literacy Education Online
LEO Law Enforcement Organization
LEO Lyons Electronic Office
LEO Long-term Ecosystem Observatory
LEO Law Enforcement Office (National Park Service)
LEO Launch and Early Orbit
LEO Leadership Experience Opportunity
LEO Local Exchange Officer
LEO Leading Empowered Organisations (leadership initiative, nursing)
LEO Lose Electrons Oxidation
LEO Let Export Order
LEO Leaders of East Orlando (Florida, USA)
LEO Low Energy Orbit
LEO Listen, Enrich, Optimize (business consulting process)
LEO Low Elliptical Orbit
LEO Logistics and Engineering Operations
LEO Local Exchange Order
LEO Labour Enforcement Officer (India)
LEO Lake Environmental Outreach
LEO Local Economic Opportunities (Kingston, NY)
LEO Lingua Et Opinio (electronic journal; German)
LEO Learn English Online
LEO Los Elfos Oscuros (Spanish: The Dark Elves)
Additional:
You're welcome!
Just for fun I tried finding the acronym with the most meanings.
So far, ACS comes in first with 329!
http://www.acronymfinder.com/ACS.html