In the prosperity of the micro-computer industry, especially in the 1980s, computers began the development of four, in many cases little or no operational requirements. However, with the development of information technology (IT), the operation became complicated, gradually recognized the need to control IT resources. With the client - server computing, microcomputers in the 1990s (known as servers) began to find their place in the old computer room. The availability of inexpensive networking equipment, plus a new standard for network cable, making a room within the company, the use of hierarchical design to place the server this may be recognized at this moment, and continue to catch on.