IAS or i.a.s.

1. Immediate access store (computing)
2. Immigration Advisory Service
3. Indicated air speed (aeronautics)
4. Instrument approach system

• click-tracks
• clampered
• clampering
• clampers
• clamping
• clamps
• clams
• clamshell
• clamshell phone
• clamshell phones
• clamshells
• clam up
• clan
• clandestine
• clandestinely
• clandestineness
• clandestinenesses
• clandestinities
• clandestinity
• clang
• clangbox
• clangboxes
• clanged
• clanger
• clangers