Module 0 resources Presented by: Oscar Abagali Nkrumah Duncan Williams Gerard Ataogye Anthony Sarpong On 14/03/2013

Module activity unit 1: computer ;networks

What is a computer? A computer is a general purpose device that can be programmed to carry out a finite set of arithmetic or logical operations.

WHAT ARE THE DIFFERENT TYPES OF COMPUTER? THE TYPES DEPEND ON: 1. Configuration/classes: the size and structure 2. Operation: the electrical / electronic signal that is used to operation.

1. Configuration: the size and structure

2. Operation principle: signal used: Analogue : set of varying voltages Digital : uses set of 0 and 1 or off state and on state Hybrid: use both forms of signals

Microcomputers / personal computers:. Popular uses for microcomputers include word processing, surfing the Web, sending and receiving , spreadsheet calculations, database management, editing photographs, creating graphics, and playing music or games. desktop computers,notebook computers, laptops, iPads, iPods, palmtop, programmable calculators, mobile phones, Tablet Computers and Smartphones, PDAs and Palmtop Computers A minicomputer is a multi-user computer that is less powerful than a mainframe. A mainframe computer is a large, powerful computer that handles the processing for many users simultaneously (up to several hundred users). A supercomputer is mainframe computer that has been optimized for speed and processing power. Supercomputer (this one is a Cray-2 from the 1980’s)

Hardware Computer hardware is the collection of physical components that make up a computer, for example, a screen, a cpu, laptop, mouse, keyboard, mother board, memory chip as RAM, ROM, ports, circuit boards, power supplies, and cooling fans, video monitor, camera, or printer etc

Input devices : These devices allow users to interact with the applications that the computer displays: Mouse Scanner CD/DVD Device Writing Tablet And Stylus Touchscreen Web Camera SD Card Joystick Microphone Bar Code Scanner An output device Is any peripheral device that converts machine-readable information into people-readable form such as a monitor, printer, plotter and voice output device. Monitors Printers Plotters Voice Output Devices Modems

Software; What is it? Software is a generic term for organized collections of computer data and instructions System software is responsible for controlling, integrating, and managing the individual hardware components of a computer system so that other software and the users of the system see it as a functional unit. Example window XP, windows 7, Linux, Mac osx, Unix etc. It consist of System Management Programs: operating system, communications software and database manage. System Development Programs System Support Programs

Features of System Software Disk formatters, file managers, display managers, text editors, memory management Interface for user communication User authentication (login) and management tools, Networking and device control software. System utility programs, system performance monitor programs, and system security monitor programs

Application software May consist of a single program used to accomplish specific tasks, e.g a spreadsheet or text processing Main type: General-Purpose Application Programs Application-Specific Software Examples: Word Processing Package, spreadsheet Packages, Database Management Packages, Graphics Packages, Communications Packages, Integrated Packages etc

Summary of the computer software- user relation

Soft ware License; Why? The software's license gives the user the right to use the software in the licensed environment. Protect the patency of software Some software comes with the license when purchased off the shelf, or an OEM- original equipment manufacturer- license when bundled with hardware. Free software license, granting the recipient the rights to modify and redistribute the software. Free software license Freeware/ trial version or shareware for a period of time say 30 days. Freewareshareware