- CALO stands for Cape Lookout National Seashore (US National Park Service)
- CALO stands for Cognitive Assistant that Learns and Organizes (US DARPA)
- CALO stands for Change Academy Lake of the Ozarks (Lake Ozark, MO)
- CALO stands for Combined Airlift Office
- CALO stands for Contingency And Limited Objectives
CALO