IGCSE Information and communication Key words.pptx

ict

1. ICT Theory Chapter 1 Key Words to study

2. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 2 KEY WORDS TO STUDY computer : a device that follows a set of instructions to carry out a series of arithmetical and logical operations Computer system : a computer combined with other equipment so that it can carry out desired functions. Hardware : the physical parts of a computer system, the parts you can touch. This includes the motherboard, CPU, keyboard, mouse, printer, and so on.

3. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 3 KEY WORDS TO STUDY 4. software : programs or applications that give instructions to the computer to tell it what to do 5. component : the parts that make up a whole machine. The internal parts are usually referred to as components and the external devices as ‘ peripherals’ 6. Central processing unit (CPU): or processor, is the unit which performs most of the processing inside a computer

4. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 4 KEY WORDS TO STUDY 7. Circuit board : a thin rigid board containing thin lines of metals on the surface to create electric circuits 8. Motherboard or system board : The main printed circuit board of the computer; it has connectors that other circuit boards can be slotted into 9. Internal memory : data storage spaces that are accessible to the CPU

5. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 5 KEY WORDS TO STUDY 10. Graphic card : a printed circuit board that controls the output to a display screen or monitor 11. Sound card : a printed circuit board that controls output to speakers and headphones 12. Networks interface card (NIC): a printed circuit board that allows the computer to communicate with other devices over a compute network

6. Types and components of computer system 6 KEY WORDS TO STUDY Applications software : programs that carry out operations for specific applications, such as word processing, spreadsheets or presentations. Applications software cannot run on its own without system software System software : system software provides the services that the computer requires to operate. This may be classified as the operating system and utility software

7. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 7 KEY WORDS TO STUDY 3. Operating system : The operating system is a collection of programs to control and manage all of the software and hardware of the computer system. 4. Utility software ( utilities ) : part of the system software that can alalyse , configure, optimize and maintain a computer to keep it working as well as possible.

8. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 8 KEY WORDS TO STUDY Compilers : convert the program written by a human in high-level language into code that the microprocessor can understand- a series of 1s and 0s Linkers : take one or more of the files produced by the compiler and combines them into a program that the microprocessor can execute Device drivers : part of the operating system. Device drivers allow the processor to communicate with devices such as the keyboard, mouse, monitor, and printer

9. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 9 KEY WORDS TO STUDY process : carry out or execute the instructions Transistor : a device that regulates current or voltage low and acts as a switch for electronic signals Digital : information represented by certain fixed values rather than as a continuous range. Usually, data represented by the digits 1 and 0.

10. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 10 KEY WORDS TO STUDY 4. analogue : information represented by a quantity ( e.g an electric voltage or current) that is continuously variable. Changes in the information are indicated by changes in voltage 5. bit : short for binary digit , is the smallest unit of data in a computer. It has a single binary value, either 1 or 0.

11. 17/Jun/2024 Mr. Thein Zaw Min Types and components of computer system 11 KEY WORDS TO STUDY 6. Sample : making a physical measurement of a wave at set time intervals and converting those measurements to digital values. 7. Digital-to-analogue converter – a device used to convert digital signals into analogue ones 8. actuator : a device that causes a machine or other device to operate