CLASSIFICATION OF COMPUTERS
Computers can be classified based on the following criteria
Development of technology (by generation)
Principle of operation (by type)
Storage capacity or by configuration (by size)
Degree of versatility (by purpose)
Classification by types
Computers can be classified into three major types based on principles of operations.
The three types are
i) Digital Computer: These are computer that perform calculation and logical operations with quantities represented as digits in binary number system. They operate on digital data such as numbers which are referred to discrete values. Digital computers give more accurate and faster results. They are counting devices. Examples are digital clocks, mobile phones, calculations, microcomputers, etc.
What is data?, What is information?
Data refers to raw facts yet to be processed. It is a fact, number or text that can be processed by a computer. Data has no meaning to the user unless processed to get meaningful information.
Source of data
Data can be obtained by any one or more of the following methods.
Observation of people, activities or event
Face to face interviews
Test or examination scores, etc.
What are the generations of computer?
Generation of computers
A generation is often referred to the state of improvement in the development of a product. Generation of computer is the advancement of computer technology from time to time.
In every generation, the circuitry has become smaller and more advanced than the previous generation. Each generation of computer is characterized by a major technological development.
There are five generations of computer, which are
First generation (1940 – 1956)
Second generation (1956 – 1963)
Third generation (1964 – 1971)
Fourth generation (1971 – 1983)
Fifth generation (1983 – present and beyond)
Data processing is the collection and manipulation of items of data to produce meaningful information. Data processing is the process of manipulation data to generate information. Data processing methods are techniques used to process/sort different types of data.