Sir (disambiguation)
From Wikipedia, the free encyclopedia
SIR or Sir may refer to:
- Sir, a respectful title for a man
- Sir (A Series of Unfortunate Events), a Guardian character in A Series of Unfortunate Events
- Sampling Importance Resampling
- Sigma Iota Rho
- Signal-to-Interference Ratio
- Singapore Infantry Regiment
- Staten Island Railway
- Statutory Invention Registration
- Surrey Iron Railway
- Sirene, a type of white brine cheese made in Bulgaria and Republic of Macedonia
- The SIR model, one of the compartmental models in epidemiology
- Serial Infrared, a category of Infrared Data Association
- Secondary Image Registration, a type of passive autofocus
- Supplemental Inflatable Restraint or airbag
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