The meaning of the Acronym IRS is...

IRS is

• Italian Rhythm Section
• Internet Racer's Supply
• International Relations Society
• Information Retrieval System
• Inserted Rectally Service
• Instinctive Reaction To Struggle
• Interesting Rural Scenery
• Irritable Rabbit Syndrome
• International Responsibility Seminar
• I Remain Standing
• International Revange Service
• Illinois Reading Society
• Instant Recreational Satisfaction
• Individualised Research Study
• Innovative Reflection Spotlight
• I Ride Slow
• Internal Revenue Sevice
• Insulin Receptor Stke
• Interesting Readers Society
• Inmate Roommate Soulmate
• Its Really Stealing
• Intrapulse Raman Scattering

More Meanings For IRS:

• Resource (WordPerfect)
• Interchange Recors Separator
• Intelligent Register System
• It Really Stinks
• I Respect Someone
• I'm Really Sexy
• International Reference Star
• Infrared Spectroscopy
• Indian Remote Sensing
• Inverse Repeated Sequence
• Instructor Rating System
• Intelligent Responsible Students
• Intimate Relations Schedule
• I'm Really Sexy
• It's Really Stupid

IRS is also in:

• Adults
• Astronomy
• Chat
• Electronics
• File Extensions
• General
• Geology
• Mathematics
• SMS
• Universities