Chapter 1
A meaning of computer
A Computer is an electronic device, operating under the control of instructions stored in its own memory
There are three process of computer
1. Collects data (input)
2. Processing
3. Produces information (output)
The Components of a Computer
A computer contains many electric, electronic, and mechanical components known as hardware. There are five type of the components of computer.
1.Input Devices is any hardware component that allows you to enter data and instructions into a computer such as keyboard, a mouse, a microphone
2.Output Devices is any hardware component that conveys information to one or more people such as printer, monitor, and speakers.
3.System Unit is a case that contains the electronic components of the computer that are used to process data such as CPU (central processing unit) ,Memory components and recording media that retain data. Data storage is a core function and fundamental component of computers.
4. Storage Devices Storage holds data, instructions, and information for future use such as USB flash drives, hard disks, optical discs, and memory cards.
5. Communications Devices is a hardware component that enables a computer to send (transmit) and receive data, instructions, and information to and from one or more computers or mobile devices.
Advantages and Disadvantages of Using Computers
Advantages
- Speed : When data, instructions, and information flow along electronic circuits in a computer, they travel at incredibly fast speeds. Many computer process billions or trillions of operations in a single second.
- Reliability : The electronic components in modern computers are dependable and reliable because they rarely break or fail
- Consistency : Given the same input and process, a computer will produce the same results, consistency.
- Storage : Computers can contain more data and information
-