Diagram of a Computer

It is considered to be a calculating device that can perform arithmetic operations at enormous speed. It is defined as a device that operates upon information/data.

• Slide Rule
• Computer
• Abacus
• Calculator

It holds data and instructions that are entered through the input unit, before they are processed. It preserves the intermediate and final results before these are sent to the output devices.

• Processor
• Hard Drive
• Input Unit
• Storage Unit

It consists of one or more input devices. Keyboard is the one of the most commonly used input device. Other commonly used input devices are the mouse, floppy disk drive, magnetic tape and etc.

• Appliances

• tools

• gadgets

• Input devices

All digital computers use the binary system, For example, 0’s and 1’s. Each character or a number is represented by an 8 bit code. The set of 8 bits is called a byte. A character occupies 1 byte space. A numeric occupies 2 byte space. Byte is the space occupied in the memory.

• Memory Size

• SD Card

• Software

• A character occupies 4 byte space.

It provides the information and results of a computation to outside world. Printers, Visual Display Unit (VDU) are the commonly used output devices. Other commonly used output devices are Speaker, Headphone, Projector etc.

• Input Unit

• Motherboard

• Output Unit

• Storage Unit

What does ALU stands for?

• Arithmetic Logic Unit Test
• Arithmetic Logic Unit
• Analog Logic Unit
• Arithmetic Linear Unit

It can perform basic operations such as addition, subtraction, multiplication, division and does logic operations viz, >, <, =, ‘etc.

• Arithmetic Logic Unit

• Analog Logic Unit

• Analog Linear Unit

• Arithmetic Linear Unit

It controls all other units in the computer

• Graphics Processing Unit (GPU)
• Random Access Memory (RAM)
• Control Unit

• Central Processing Unit (CPU)

It serves as the brain of the computer.

• Memory Management Unit (MMU)
• Input/Output Unit (IOU)
• Graphics Processing Unit (GPU)
• Central Processing Unit (CPU)

It can be defined as a small, relatively inexpensive computer designed for an individual

user. It is based on the microprocessor technology that enables manufacturers to put an entire CPU on one chip.

• Smartphone
• Personal Computer

  (PC)

• Laptop
• Tablet