LECTURE TWO. EVOLUTION AND TYPES OF COMPUTERS. Introduction. After having an overview of computer systems, let us now move on to learn how they have evolved over the years, from a computer that filled a whole room to one which can fit in your hand. The History of Computers.
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EVOLUTION AND TYPES
Pascal’s calculating machine
The grandfather of computers
John Von Neumann’s Machine
The trend in the computer’s technological revolution can be summarized as follows:
(a) Data Manipulated
(b) The purpose for which they are designed :-
(c) The basis of price, size and capabilities
Digital computers are the most commonly used type of computers. Their arithmetic operations and logical comparisons are based on digits (1s and 0s) and on other characters that have been numerically coded.
These computers can process both numeric and alphabetic or alphanumeric data. Memory sizes determines capability
Example of a mainframe computer
Fifth Generation Languages