The meaning of the Acronym SIR is...

SIR is

• Systems Integration Review
• System Interface Requirements
• Software Initiated Restart
• Shuttle Imaging Radar

More Meanings For SIR:

• Surface Insulation Resistance
• Shuttle Imaging Radar
• Science Information Robot
• Statistical Inventory Reconciliation
• Scientific Information Retrieval
• Sampling Importance Resampling
• Skill Integrity And Responsibility
• School Improvement Review
• Silencing Information Regulator
• Speed Integrity And Reliability
• Serial Infrared
• Solitaire file Bitmap graphics
• System Internal Resource
• Sustained Information Rate
• Society of Interventional Radiology (formerly SCVIR)

SIR is also in:

• Accounting
• Drivers
• Educational
• Electronics
• FDA
• File Extensions
• General
• Law
• Ocean Science
• Stock Exchange
• Universities