What does HALO stand for?

What does HALO mean?

HALO	High Altitude Low Opening Governmental » Military
HALO	High Altitude Low Open Governmental » Military
HALO	High Altitude Observatory Governmental » Military
HALO	Hispanic American Leadership Organization Miscellaneous » Unclassified
HALO	High Altitude Long Operation Governmental » NASA
HALO	Healthy Alternatives for Little Ones Community
HALO	Husker Angels Loving Others Academic & Science » Universities
HALO	Housing and Assisted Living Options Community
HALO	Hospital Affiliated Lobbyist Organization Governmental » US Government
HALO	Home And Lot Owners Community
HALO	High Automation Low Operating Miscellaneous » Unclassified
HALO	Ham And Lettuce Ouch Miscellaneous » Funnies
HALO	Huge Ass Large Ovoid Miscellaneous » Unclassified
HALO	Horizonal Application Layer Overlay Miscellaneous » Unclassified
HALO	High Angle Lift Off Governmental » Transportation
HALO	High-Altitude Low-Opening Parachute Technique Governmental » Military
HALO	Halosource Di Business » London Stock Exchange