IRS (disambiguation)

IRS is the United States Internal Revenue Service.

IRS, irs, or IRs may also refer to:

• I.R.S. Records, an American record label
• "I.R.S.", a song by Guns N' Roses on their album Chinese Democracy
• Irwin R. Schyster, a ring name of Mike Rotunda
• IR$, a Franco-Belgian comics series

• Inertial reference system, continuously computed dead reckoning

• Indian Revenue Service, the Indian taxation agency
• Interest rate swap, a linear interest rate derivative involving exchange of interest rates between two parties
• Internal Revenue Service (Ghana), the Ghanaian tax institution
• Imposto sobre Rendimentos Singulares (IRS), the Portuguese tax over personal income

• Independence Republic of Sardinia, a political party, Italy
• Leibniz Institute for Research on Society and Space, of the Leibniz Association

• Indoor residual spraying, a process of spraying insecticides inside residences to prevent malaria
• Insulin receptor substrate, a group of signaling proteins
  • Insulin receptor substrate 1, a protein found in humans
  • Insulin receptor substrate 2, a protein-coding gene in the species Homo sapiens
• Intergroup Rhabdomyosarcoma Study Group, a clinical trial cooperative group

• Independent rear suspension, a form of car independent suspension
• International Railway Solution, International Union of Railways leaflets
• International Railway Systems, a Romanian company
• IRS Aero, Russia
• IRS Airlines, Nigeria
• Kirsch Municipal Airport, an FAA code

• International Rules Series, an international football competition
• Indian Remote Sensing satellite, an Earth observation satellite
• Indian Readership Survey, a continuous readership research study
• Institutionalized riot systems, an interpretative paradigm
• Integrated reception system, for broadcast signals
• Infrared spectrum, a form of electromagnetic radiation