Computers for individual use :

• Desktop computer : Stationary use, most common type, on desk or floor
• Workstations : Specialized and optimised for science or graphics. More powerful.
• Notebook computers : Small Portable Computer, power = Desktop
• Tablet computers : Newest developpement in PC
• Smart phones
• Handheld computers : Very small computers, data synchronised with desktop possible

For Organizations :

• Network servers : Centralized computer that connects all other computer providing access to network ressources = a powerful desktop
• Mainframes : Large organizations. Thousand of users that access data through a terminal.
• Mini/Midrange computers : Small organisations. Power between mainframes and desktop. Hundred of users with access throught a terminal.
• Supercomputers : Most powerful t'ill this day. Large and complex calculations. Reasearch organizations.

Namely

Governement : Necessaru to track data population. They were the first computer users.

EX : Police officers, tax calculation and collection

Industry : Products and are designed and assemply lines are automated

Healthcare : Better scheduling of appointement and dicoveries of new treatement

• Hardware : The physical and mechanical part
• Software : Tells the computer what to do. Can be called a program
• Data : Raw facts, computers organize and presents data
• User : People operating the computer

• Processing devices : They are the brains of the computer that executes instructions while manipulating data. Most computers have several processors. Made of silicon and copper
• Memory devices : store data or programmes. With RAM beign a volatile memory storring current data and programmes. While ROM is used for permenant storage of programs it hold the computers boot ditections.
• Input and output : Allows the user to interact accepting and delivering data.
• Storage devices : Holds Data and programs permenantly

Two types : - System software. - Application Software.

• System software : Most important. Includes the Operating and Network Operating system
• Application software : Accomplishes specific tasks and covers most common uses of computers.
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Data are stored using the binary system and they can be organised into files. Computers with no user input needed exist and are automated.