The program "NetChrom V 2.1" is intended for automation of chromatographs. The program allows simultaneous signal processing and control from one to eight chromatographs on one IBM PC type. Chromatographs are connected to RS-232C serial interface or USB interface. The program provides control and processing of the chromatographic signal of the following chromatograph models: "Crystallux-4000M" "Crystallux-4000" (after replacing the managing controller of the chromatograph) "Crystal-2000" (connected to a personal computer using a standard interface device) Petrochrom-4000 LGH-3000 "Dome-55". The program also provides processing of the chromatographic signal of automated chromatographs type LHM-80, model 3700, series COLOR, etc., including foreign ones. Chromatographs are connected to a computer through an analog-to-digital conversion unit.