DEVELOPING & SUSTAINING ICT COMPETENCY SKILLS AMONG PUBLIC SECONDARY SCHOOL STUDENTS
OYELAGBAWO GRAMMAR SCHOOL
INTRODUCTION TO COMPUTING
BRIEF ANALYSIS OR DESCRIPTION OF COMPUTER
Computer is a fast operating machine that can be used for home business and educational functions to enhance productivity.
Computer is a collection of electronic parts, or hardware that has a set of electronic instructions called software.
All computers perform the same basic functions; they enable you to store and process data which eventually turn to was is known as information.
CHARACTERISTICS OF A COMPUTER
The ability to perform calculation at very high speed
Ability to take in data, process it into information and store that information for future use.
The ability to take in and store sequence of instructions called program which must be written in computer language.
The ability to obey sequence of program instructions provided the program is stored within the computer.
The ability to use simple logical rules to make decisions for their own internal control, or for the control of some external activity
e.g. to take over the role of calculator operator.
Ability to work without tiredness.
Ability to repeat a single task in a million times.
The ability to communicate with other systems.
The ability to exploit a complex internal structure of a microelectronics circuitry in a variety of ways.
CLASSES OF COMPUTERS
A few years ago, computers were easily classified as mainframe, minicomputer or microcomputer. Mainframe computers were physically large and powerful systems capable of supporting hundreds of users. They had relatively large amount of RAM (e.g. 1-2 Mb) and disk storage (e.g. 100 to 400 Mb). Minicomputers were smaller less powerful machines than mainframes, but were still multi-user machines.
A desktop computer is a personal computer (PC) in a form intended for regular use at a single location, as opposed to a mobile laptop or portable computer. Prior to the wide spread of microprocessors, a computer that could fit on a desk was considered remarkably small.
Today the phrase usually indicates a particular style of computer case. Desktop computers come in a variety of styles ranging from large vertical tower cases to small form factor models that can be tucked behind an LCD monitor.
The term 'desktop' refers specifically to a horizontally-oriented case, usually intended to have the display screen placed on top to save space on the desk top. Most modern desktop computers have separate screens and keyboards.
PERSONAL DIGITAL ASSISTANTS (PDA'S)
A Personal Digital Assistant (PDA) is a handheld computer, also known as small or palmtop computers.
Newer PDAs also have both color screens and audio capabilities, enabling them to be used as mobile phones (smart phones), web browsers, or portable media players.
Many PDAs can access the Internet, intranets or extranets via Wi-Fi, or Wireless Wide-Area Networks (WWANs).
LAPTOP AND NOTEBOOK COMPUTERS
A laptop computer or simply laptop (also notebook computer, notebook and notepad) is a small mobile computer, typically weighing 3 to 12 pounds (1.4 to 5.4 kg), although older laptops may weigh more.
Laptops usually run on a single main battery or from an external AC/DC adapter that charges the battery while also supplying power to the computer itself even in the event of a power failure.
The term "Mini Computer" was coined at the time when most computers were cabinet sized like Mainframe Computers. Mini computers were much smaller, less powerful, and much less expensive than Mainframe Computers. The first Mini computers generally only performed one task at a time, while bigger computers ran multi-tasking operating systems, and served multiple users.
The term Mainframe Computer was created to distinguish the traditional, large,...
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