HOS

Noun

• Initialism of hall of shame
• Initialism of head of state
• Initialism of hours of service
• Initialism of Holt-Oram syndrome
• Initialism of higher-order statistics
• Initialism of Health Online Service
• Initialism of Health Organization Studies

Proper Noun

• Initialism of Hampshire Ornithological Society
• Initialism of Hands On Sacramento
• Initialism of Health Outcomes Survey
• Initialism of Hekscher-Ohlin-Samuelson
• Initialism of {{w}}
• Initialism of Horizon Open Systems
• Initialism of {{w}}
• Initialism of {{w Service}}
• Initialism of Haverfordwest Operatic Society
• Initialism of {{w}}