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What is computer Hardware ?

• The physical part of a computer 
• All tangible items in a Computer system fall into the category of hardware.
• Can be internal (located inside the system unit) or external (located outside of the system unit) 

Categories of computer Hardware 

• Input 

input devices are used to capture or enter data into the computer.Before  data can be used within a computer system,it is usually necessary to convert them into a format that supports processing by computer.Most data are held in human-sensible form that is in a format that makes them directly accessible to human beings.Input devices convert data into a form that makes them machine-sensible.

• Output

Output devices translate the result of processing-output-into human-readable form.The result of a calculation,for example,might be display on screen or sent to printer. An output device may also transfer data requiring further processing to a storage device.  

• Internal Storage

         Its's also known as:

• Primary Storage 
• Main Storage
• immediate Access Storage (IAS)
• RAM & ROM

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Structure of a processor

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What is a Computer system

Computer system

Computer system will include the computer along with any software and peripheral devices that are necessary to make the computer function.Every computer system, for example, requires an operating system.

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What are the Data & Information ?

Data 

Data are 'raw' details  (facts) which do not necessarily mean anything in its purest form.in a database system, data are fact such as employee names, customer ID number,inventory items or customer sales orders.

Information

information is data that has been processed in such a way as to be meaningful to the person who receives it.It is anything that us communicated. 

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Information technology

Information technology (It) is the application of computers and telecommunications equipment to store,retrieve,transmit and manipulate data

1. often in the context of business or other enterprise.
2. The term is commonly used as a synonym for computer and computer networks, but it also encompasses other information distribution technologies such as television and telephones.Several industries are associated with information technology, semiconductors,internet, telecom equipment, e-commerce and computer services.
3. In a business context, the Information Technology Association of America has defined information  technology as "the study, design, development,application,implementation,support or management of computer-based information systems" .
4. The responsibilities of those working in the field include network administration, software development and installation, and the planing and management of an organization's technology life cycle,by which hardware and software is maintained,upgraded and replaced.
5. Humans have been storing, retrieving, manipulating and communicating information since the Sumerians in Mesopotamia developed writing in about 3000 BC

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