What does CIR stand for?

Cosmetic Ingredient Review

Copernican International Financial Split Corporation Class A

Congressional and Intergovernmental Relations

Capital Investments Review

Coordinator of International Relations

Circus

In British usage, an open area at a street junction or intersection or a group of buildings arranged around such a space, which may then serve as a public garden. A fighter sweep over enemy territory, particularly airfields to draw the fighters into battle. 

Committed Information Rate (Frame Relay)

Current Instruction Register

Circuit Reliability

Carrier-to-Interference Ratio