 "IAR" is an abbreviation of Ingenjörsfirman Anders Rundgren, which means Anders Rundgren Engineering Company.IAR Systems develops C and C++ compilers, debuggers, and other tools for developing and debugging firmware for 8-, 16-, and 32-bit processors.The company started out in the 8-bit market, but moved into the expanding 32-bit market, especially the market for 32-bit microcontrollers.