In the year 1991 the Group of Theoretical Chemistry purchased the first workstations IBM RISC System/6000 for intensive quantum chemical and other calculations. From then, several modifications have taken place on the original installation. In September 1995 a new multiprocessor computer IBM SP2, with three processors, was added to Group network, and the total computing power was increased by a factor of ten. The number of computers installed increases until eight workstations. In September 1996 was included a Silicon Graphics PowerChallenge L computer with 6 processors R8000@90MHz. The computing power doubled again..