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Computer Memory This is the part of the computer where data, programs and information are stored for use of the computer. It comes in form of a chip. The basic unit for computer memory is byte. Other units are KB, MB, GB, etc. All computers have memory units. The programs a computer is running as […]
OUTPUT DEVICES These are hardware components used to obtain results from computer after processing. They convert data from machine-readable format into human readable format. Examples of output devices are monitor, printer, speaker, projector, plotter, etc. MONITOR This is an output device that displays the result of processing on the screen. It resembles a T.V set […]
INPUT DEVICES These are hardware components used in entering data into the computer for processing. They convert data from human-readable form into machine readable format. They take information from the user of the computer, convert it into electronic signals and transmit it to the processor. Examples of input devices are keyboard, mouse, joystick, microphone, […]
ICT is an acronym which stands for Information and Communication Technology. It is defined as set of technological tools and resources used to communicate,
NUMBER BASES CONVERSION OF OTHER BASED TO DECIMAL SYSTEM To convert numbers in other bases to denary system, expand the given number in powers of its base and evaluate. Examples 1) Convert the following numbers to base ten (i) 10012 (ii) 255eight (iii) 35416 (i) 10012 = 1 x 23 + 0 x 22 + […]
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 Digital computer Analog […]
DIGITIZATION OF DATA What is Digitization of data? Digitization is the process of converting analog information into a digital format. For example, scanning of analog source like printed photos or taped text, images or videos into computers for editing. Digitizing is the primary way of storing images in a form suitable for transmission and computer […]
DATA AND INFORMATION What is data? 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 […]
GENERATIONS OF COMPUTER 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 […]
COMPUTER ROOM AND MANAGEMENT ETHICS What is computer room? A computer room is a place where computers are kept for use. Computers need a room well ventilated and conductive for optimum performance. Types of Computer Room Computer room must be designed intelligently and serve the purpose they were intended to serve. The design and […]
Data processing is the process of converting raw fact (data) to information (processed data). It embraces the techniques of sorting, relating, interpreting and computing items of data in order to provide meaningful useful information. Steps in data processing i) Preparation of source document: Here, figures, facts are obtained through different sources like name, age, […]
Number Bases Number Bases – Binary Number System, Octal Number System, Denary Number System (Decimal) and Hexadecimal Number system.
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