The meaning of the Acronym IG is...

IG is

• Inertial Guidance
• Igloo

More Meanings For IG:

• Insert Graphic
• Index Generation
• Generic interface source (Modula-3)
• Instance Generator
• Input Grammar
• Interface Group
• Instant Gratification
• Inadequate Guys
• Isolated Ground
• Inner Geometry
• Inter-Galactic
• Inert Gas
• Ideal Gas
• Insulated Grounding
• Insulated Gate

IG is also in:

• Amateur Radio
• Architecture
• Assembly
• Astronomy
• Chat
• Chemistry
• Databases
• Electronics
• File Extensions
• General
• Software
• Telecom