1. Brief overview Basic Concepts of Computer

2. What is a computer? A computer is a tool to process data Data Alphabet/Numeric Graphic Sound

3. Types of computers Supercomputers Mainframe computers Mini Computers Micro Computers – PC - Personal Computers – Portable computers – PDAs - personal digital assistants

4. Computer & Network Stand Alone LAN – Local Area Network WAN – Wide Area Network Internet – Global Network of Networks

5. Two basic compoments of a computer system Computer Hardware (Equipment) Software (Programs)

6. Hardware System Unit Peripherals CPU (Central Processing Unit) RAM (Random Access Memory) ROM (Read Only Memory). Motherboard Disk Drives - Floppy disks - CD/DVD - Hard disk - Pen Drive Input devices keyboards monitors Microphones scanners bar-code readers digital cameras. Output devices monitor (screen) printers speakers

7. Software System Software Application software Operating System Software Windows Linux Drivers Anti-Virus Specialised Packages Word processing Spreadsheets Databases Web browsers Web Page Editors Desktop Publishing Accounting Programs Presentation Integrated Packages Games Industrial

8. Software Licences Proprietary e.g Microsoft Window, Microsoft Office Free/Open Source Software Linux, OpenOffice Mozilla FireFox Mozilla Thunderbird