The meaning of the Acronym NOS is...

NOS is

• New Organ Series
• Never On Sunday

More Meanings For NOS:

• Network Operations Service
• Network Operating System
• Novell Operating System
• Network Operating System
• Nasty Original Stuff
• Never Otherwise Stated
• Nitrous Oxide System
• Nitrous Oxide Systems
• Nitrogen Oxide System
• National Ocean Service
• National Ocean Service
• National Open School
• Narrow Over the Shoulders
• Never Offer Service
• Non Otherwise Specified

NOS is also in:

• Chat
• Chemistry
• Clothes
• Funnies
• Meteorology
• Networking
• Ocean Science
• Software
• Telecom
• Unit Measures
• Universities