Unit 1 And Unit 2 Ict Notes Pearson Edexcel 9-1

UNIT 1:Chapter 1:DIGITAL DEVICESTuesday, March 11, 2025Types of digital devicesMainframe computers: These are large computers that can do a lot of complicated jobs quickly.Super computers: These are the fastest type of computers. Supercomputers are very expensive and are employed for specialized applications that require immense amounts of mathematical calculationsTuesday, March 11, 2025Personal computers Desktop computer: A desktop PC usually has these basic components: a monitor, a keyboard, a system unit and a mouse.It always provide users with option to upgrade or add additional components. Tuesday, March 11, 2025Laptops A laptop includes a keyboard, a screen and a rechargeable battery.Some laptops are called desktops replacements.Embedded computers An embedded computer is designed for and built into a specific application where it will perform a limited range of dedicated functions. Examples: home appliances, industrial robots, air conditioning systems. Tuesday, March 11, 2025Mobile phones Mobile phones use a sim card to connect to mobile phone networks. A sim card (Subscriber Identity module) is used to identify a subscriber on the network.Tuesday, March 11, 2025Cameras and camcorders Digital cameras are used to capture still images.Camcorders are used to capture moving images (videos).Digital images are made up of small dots called pixels.Tuesday, March 11, 2025Televisions Television