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MOTHERBOARD
The Motherboard or main board, consists of a board containing electric circuits that connect all the important
components of the computer. If the CPU is the brain of the computer, then, the motherboard is the central nervous
system making it the backbone or spine of a computer system. It consists of:
Motherboard
• Ports to connect different input and output devices.
• Memory slots that contain the system's main memory.
• ROM-BIOS chip that acts as an interface between the operating system and the hardware of a computer.
• System Clock that synchronises all the components of the motherboard.
• Power connector that gives power supply to all the essential components on the motherboard.
UNDERSTANDING OPERATING SYSTEM
An Operating System is a system software which acts as an interface between the user and the computer. It is an important
component of a computer system which controls all other components of the computer system. It helps us to communicate
with the computer without knowing its language. Without an Operating System the computer is of no use. Some of the
commonly used Operating Systems are Windows, DOS, UNIX, Ubuntu, MacOS etc. Mobile devices also have operating
system that help them perform their functions. For example, Apple iOS and Google Android.
APP APP
APP APP
APP APP
Operating
System
Operating System
ICT Skills-I 85

