The operation of the first electron accelerator at the Institute of Nuclear Chemistry and Technology - INCT the former Institute of Nuclear Research was started in 1971. It was an UHF linac LAE 13/9. Since then 8 more accelerators have been installed in the INCT to be applied in radiation chemistry and radiation physics. These are: a HF resonance accelerator ILU 6 (1988), an electrostatic accelerator AS-2000 (1987), an UHF linac Pilot 1 (1990), two transformer high power low energy accelerators ELV type 3A (1991), two UHF linacs Elektronika U-003 (1992) and UHF linac LAE 10 (1995). In addition to basic studies many technological problems were investigated on the laboratory and the pilot plant scale. The main technologies developed using the accelerators are: radiation sterilization, modification of semiconductors, modification of polymers, manufacturing of heat shrinkable materials (tubes and tapes), food preservation and hygenization, hygenization of municipal sewage sludges, flue gas treatment by radiation and others.