1. Give definition to information and communication technologies

Information Communication Technology (ICT) includes all the technologies used for communication of information. These include devices such as computers, internet and intranet, local and wide area networks (wired and wireless), voice mail, e-mail, audio visual systems, compact discs and video discs, broadcast receiving systems and telecommunication systems, media, printed media, virtual learning centers, instructional software, education television, satellite communication, cable TV, conventional and interactive radio used in teaching and learning.

2. Describe computer systems

A computer is an electronic system that can be instructed to accept, process, store, and present data and information. It is made up of two component parts: hardware and software.

– Hardware is a general term for the physical components that make up a computer system, for example keyboard, mouse, monitor, processor, circuit board and so on.

– Software is a general term for the programs that control the computer system. Software is any set of instructions that tells the hardware what to do and how to do it.

There are two types of software:

-systems software: programs that allow the hardware to run properly, e.g.operating systems

-applications software: programs that allows the user to do specific tasks, e.g.

Main components of computer systems:

- input devices: keyboard, mouse

- output devices: monitor, printer

- secondary storage devices: DVD R/W drive, removable hard drive.

3. Give definition to Operating system.

An operatingsystem isthe mostimportantsoftware thatrunson a computer. Everygeneral-purposecomputermusthaveanoperatingsystemtorunotherprograms. Italsoallowsyouto communicate withthecomputerwithoutknowinghowtospeakthecomputer'slanguage. Itmanagesthecomputer's memory, processes, andallofitssoftware and hardware, i.e. managesalltheotherprogramsin a computer.

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. In addition, users can interact directly with the operating system through a user interface such as a command language or a graphical user interface (GUI).

Classification of Operating systems: Multi-user, Multiprocessing, Multitasking, Multithreading, Real time.

Allmodernoperatingsystemsuse a graphicaluserinterface, or GUI (pronounced gooey). A GUI letsyouuseyourmousetoclick icons, buttons, and menus, andeverythingisclearlydisplayedonthescreenusing a combinationofgraphics and text.

Thethreemostcommonoperatingsystemsforpersonalcomputersare MicrosoftWindows, AppleMac OS X, andLinux.

4. Give definition to Software

Software is a general term for the programs that control the computer system. There are two types of software:

-systems software: programs that allow the hardware to run properly, e.g.operating systems

-applications software: programs that allow the user to do specific tasks, e.g. spreadsheets.

Software is any set of instructions that tells the hardware what to do and how to do it. Examples of software include web browsers, games, and word processors. Below, you can see an image of Microsoft PowerPoint, which is used to create presentations.