How the Networks Works

How the Networks Works.
Before the advent of the PC, there was the terminal - a monitor somewhat dumb - and a keyboard, they allowed users from one location to have access to the same central computer. Generally, this computer was a great and mysterious sealed box, located in another room, managed by technicians wore lab coats.

The mere users were forbidden to enter the room and, of course, were not allowed to go directly to the
computer. The people who sat in front of the terminals had to be content with the blessings or failures that
Your computer or technical managers poured over them.


With the centralized computer, users had access only to the program that the team of MIS (Management Information System, or system of information management) chose. To obtain a new kind of program information, there need for a written request to the MIS technicians, whose response generally took weeks.

The personal computer - at least initially - seemed to represent the beginning of the decline of centralized computer. The users could install on their PCs programs they wished. The information they could get the PC were limited only the skill with the program. And many users found that the computer was really something as large and Powerful Oz: once partially lifted the curtain that MIS placed around the computer, users
found that computers were only machines not intimidated, though.

Increasingly tasks aimed to mainframes and minicomputers turned to PCs In
Overall, everything was walking well, but the removal of centralized computers suffered a loss. When people work in Stand-alone PCs - ie PC independent, without communication with other PCs - also work with information stand-alone. People lose the advantages of access to information that is on the PC in the next room. If a colleague work does something that influences the basic data of a business, the PC user stand-alone is not knowing what occurred. Individual PCs do not reflect a very important aspect of the way most people work - in cooperation with others.

Source: Evolution of Computers