Introduction of computer?

-

 History of computer:-

Napier’s Bones
• Invented by John Napier in 
1614.
• Allowed the operator to 
multiply, divide and 
calculate square and cube 
roots by moving the rods 
around and placing them in 
specially constructed boards. 
Slide Rule 
• Invented by William Oughtred 
in 1622.
• Is based on Napier's ideas 
about logarithms.
• Used primarily for
– multiplication
– division
– roots
– logarithms
– Trigonometry
• Not normally used for addition
or subtraction. 
William Oughtred
ENIAC
• ENIAC stands for Electronic 
Numerical Integrator and 
Computer.
• It was the first electronic general￾purpose computer.
• Completed in 1946.
• Developed by John Presper 
Eckert and John W. Mauchl. 
UNIVAC 1
• The UNIVAC I (UNIVersal Automatic Computer 1) 
was the first commercial computer.
• Designed by J. Presper Eckert and John 
Mauchly.

Charles Babbage, a British mechanical engineer and Polymeth, came up with the idea of ​​a capable computer. Considered the "father of computers", he conceived and invented the first mechanical computer in the early 19th century.

What is Computer?

"Computer is an electronic device, User enter data as an input computer process it and change into useful information and display result on screen as an output."


What are the main parts of computer?

  • 5 different parts of the computer; take a look under the hood
  • CPU
  • Keyboard
  • Mouse
  • Storage: Solid State Drive (SSD) or Hard Disk Drive (HDD)

What is LCD?

A liquid-crystal display is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly, instead using a backlight or reflector to produce images in color or monochrome.

What is CPU?

A central processing unit, also called a central processor, main processor or just a processor, is an electronic circuit that follows instructions contained in a computer program. The CPU performs basic math, logic, controlling, and input / output operations as defined by the instructions given in the program.

What is keyboard?

A computer keyboard is an input device modeled after a typewriter keyboard that uses a set of buttons or keys to act as mechanical levers or electronic switches.
There are two layouts of keyboard available QWERTY or non QWERTY.

What is Mouse?

Mouse is also an Input device.A mouse is a small, mobile device that lets you control a lot of things on a computer. Most types of mice have two buttons, and some have a wheel between the buttons. Most types of mice are connected to a computer by a cable, and use the power of the computer to operate. Some types of mouse are wireless.


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