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 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.
A computer professional maybe:
(1) A person working on the field of Information Technology
(2) A person who has undergone training in a computer related field colleges, universities and computer institutes.
(3) A person who has an extensive knowledge in the area of computing.
1. Click on start button at the bottom left of the desktop
2. A pull-up menu will appear
3. Click on “All Program”. A pull-up menu will appear again.
4. More the mouse pointer to Microsoft office. A drop down menu will appear.
5. Click on “Microsoft Excel”
6. Wait while the Microsoft Excel loads and appear on the desktop.
A spreadsheet interactive computer application program for organization, analysis and storage of data in tabular form.
A spreadsheet application is a computer program such as Excel, open office Cacl, or Google Docs spreadsheets. An electronic spreadsheet is a computer program that is used for storing, organizing and manipulating data.
ICT (Information and Communication technology) is an umbrella term that includes any communication, encompassing; radio, television, cellular phones, computer and network hardware and software, satellite systems and so on as well as the various services and applications associated with the much as video conferencing and distance learning.