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
The grandfather of computers
Hollerith’s Machine interpreted into an understandable language. His ideas contributed to the invention of punched card readers and paper tape readers used in the first generation of computer systems.
Aiken’s Machine Automatic Sequence, Controlled Calculator, and also known as the Harvard
Figure ENIAC Automatic Sequence, Controlled Calculator, and also known as the Harvard
John Von Neumann’s Machine Automatic Sequence, Controlled Calculator, and also known as the Harvard
These computers influenced by the amount of research towards further development of the computers, and the related facilities and concepts.
The trend in the computer’s technological revolution can be summarized as follows:
(a) Data Manipulated
(c) The basis of price, size and capabilities
Digital computers produced by a plotting pen or a trace on a cathode ray tube. Its output signals can be used directly to control the operation of some other machine or process. 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 flexibility to operate automatically.
Mini Computer though slower than the mainframes. They are more costly than the micros but cheaper than the mainframes.
Micro Computer monitor, a keyboard, Winchester disk (hard disk), a mouse, a printer, a diskette drive and an optical disk drive. Can be connected to larger computer.
Fifth Generation Languages