Definition of Information This is data already processed into a meaningful form for decision making. Information conveys meaning and is useful to one or more people. Definition of Transmission This is the process of transferring something from one location to another location, from one person to another person or from one device to another device. […]
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Users are a key component in any information system. Therefore, protecting users is just as important as protecting hardware, software and data. The widespread use of computers have led to some important health concerns which are; Repetitive Strain Injury (RSI) Computer related RSI’s are the largest job related injury and illness in the United States
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Many of us go through our daily routine without noticing how many times we come into contact with computers. Computer technology has become such a part of our daily lives that if it were taken away we would lead radically different lives. Information communication technology involves the use of modern communication channels to convey information.
Meaning of ICT ICT is an acronym which stands for Information and Communication Technology. It can be described as a diverse set of technological tools and resources used to communicate and to create, disseminate, store and manage information. These technologies include; (i) Computer (ii) Internet (iii) Broadcasting technologies (radio and television) (iv) Telephone Uses
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Rules and Regulations of the Computer Laboratory The following are the rules and regulations of the computer laboratory: Computer room should be kept tidy always by regular cleaning Do not remove or load any software into the computer The security should be very tight to prevent stealing of the equipment. Eating: eating in whatever form
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Definition of Computer Room Computer room is a room specially created for keeping computers and other peripheral devices. It is also called computer laboratory. In designing this room, the components of a computer room must be put into consideration. Components of a Computer Room Computer system Furniture (computer tables and chairs) Electric surge protector Stabilizer
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THE KEYBOARD AND TYPES OF KEYBOARD CONTROL KEYS:they are used in line with other keys to instruct the computer to perform specific tasks. They are ctrl, del Esc and Alt. CURSOR- CONTROL KEYS: otherwise known as curdor manipulations keys allow the user to move the cursor to the left, right, up one line and down
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Definition of the Keyboard The keyboard is an input device that is used to send data into the computer. Its cable must be connected to a port of the system unit before it can operate. It is similar to an ordinary typewriter keyboard. The keyboard is used mainly to enter alphabets from A – Z,
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TYPES OF MICRO COMPUTER Micro computer is the smallest and the cheapest class of computers built for special purposes, e.g. for use in clocks, cameras etc. Micro computer contains between ten thousand and two million bytes of internal memory locations, a micro processor and can allow few input/output devices to be attached to it. Micro
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There are different basic types of processing; namely: Batch processing Real time processing Time sharing processing Demand processing Batch processing In Batch processing, data are gathered over a period of time and the batch of transactions is processed together. It employs sequentially processing technique which consists of processing the first record of the file sequence,
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Data processing is the process of converting data into meaningful information. It involves collection of data or gathering of data. Data processing often refers to the use of computers in commercial applications as distinct from engineering applications. It is also an act of collecting data, assembling them and making them available to the processor in
ADVANTAGES OF USING WORD PROCESSING PACKAGES The use of computer allows for neat jobs. It makes typing pleasurable. There is room for corrections such that it does not leave any scar on the document. With the use of computer, text could be formatted to suit the user’s taste. It allows Mail Merging operation thereby relieving
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INTRODUCTION TO WORD PROCESSING PACKAGES A word processing package enables you to type in and manipulate text. It helps you to enter, store, format, copy and print text. It is a software that turns the computer into a sophisticated typewriter. With any type of word processing software, you can produce any kind of document, large
Computers functions best when used in the right environment. The right environment can be refers to as the computer room/laboratory. Computer room is a room specially created for keeping computers and other peripheral devices. COMPUTER ROOM REQUIREMENT Computer system Furniture Tiles Electricity source Stabilizer Air conditioners/fans Mouse and mouse pad Uninterruptible Power Supply(UPS). Printer Speaker
A System unit also known as a base unit, is electronic circuitry housed within the computer cabinet. It is the part of the micro computer that contains the Central Processing Unit (CPU). THE INTERNAL FEATURES OF THE SYSTEM UNIT Is the main body of a personal computer, typically consisting of a plastic/metal enclosure containing thefollowing:
THE MONITOR The monitor is an output device used to display information. The monitor is also called Visual Display Unit (VDU). It is similar to ordinary television screen. The output on a monitor is called softcopy. This output is available to the user only for as long as another output has not replaced it. Thus,
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SPREADSHET TERMINOLOGIES A cell is a space in a worksheet formed by the intersection of a row and a column. An active cell is the cell that is currently worked upon. E.g cell G7 is the active cell the above diagram. ROW: is defined as the horizontal space that is going across the window.
SPREAD SHEET Spreadsheets are like lined paper with columns. The sheet itself comprises of columns (vertical) and rows (horizontal) which are in turn, made up of cells. A spreadsheet is the computer equivalent of a paper ledger sheet. Spreadsheet can be defined as the combination of rows and columns used in performing arithmetic calculations.
There are various forms or ways by which database can be set up. They include: Flat file database Relational database Hierarchical database Network database Operational database Distributed database End user database FLAT FILE DATABASE This is the traditional data file storage system ideal for storing small amounts of data that needs to be humanly
Database is an application that is used to store information in a structured way. It is a collection of records or data in an organized form. A database is an organized collection of related information that allows the storage of different types of record with appropriate interconnections. Databases are designed to offer an organized mechanism