J.C.R. Licklider (1915-1990) - who was often forced to work monotonic data management acitivies during his cybernetic and psycho acoustic researches- had designed the theory of a computer which is the best for the people: interactive, has multimedia system, and easy to use. All of this he did in the ’50s which was the age of computer-giants.   His plans and dreamlike ideas were always followed by acts, so his associates developed one hardware- and software novelty after another, in his self led research office: the graphic screen, the mouse, split screen video conference, first hypertext based system. In 1963 he suggested the computers’ connection into a network, so research groups can cooperate in a more successful way. The first experimental network started to operate in 1969, launching the evolutionary process which led to the internet. The PC success story began in the ’80s. Soon born the idea how to assemble a huge computing capacity system from the cheap tools.  In the Grid systems not only PCs can be connected, but bigger machines. The conception of spaced computational environment assembled from the users’ computers had been introduced by distributed.net (dnet) and SETI@home in the ’90s. Both projects proved not only that the conception is perfect, but that it works better than predicted. The meaning „Grid-computing” is being used since the 1995 I-WAY experiment, when 17 North American supercomputers were connected for a short time with the help of amazingly fast networks. Several research projects can be traced back to this experiment, furthermore yet more Grid plans are being born, mostly by IBM. From 2000. the financial sources started to rise. Regular global networks doesn’t, but subsystems are already exist, i.e. the european DataGrid.