Generation and Classification of Computer for IBPS RRB Officers Selection Exam

Get top class preparation for competitive exams right from your home: get questions, notes, tests, video lectures and more- for all subjects of your exam.

Development of computer

Abacus

• Abacus is known to be the first mechanical calculating device.
• It was used to be performed addition and subtraction easily and speedily.
• This device was a first developed by the Egyptians in the 10^th century B. C, but it was given it final shape in the 12^th century A. D. by the Chinese educationists.

NAPIER՚s BONES

• As the necessity demanded, scientist started inventing better calculating device.
• In this process, John Napier՚s of Scotland invented a calculating device, in the year 1617 called the Napier Bones.
• In the device, Napier has used the bone rods, these rods that one can do addition, subtraction, multiplication, and division easily.

Pascal Calculator

In the year 1642, Blaise Pascal a French scientist invented an adding machine called Pascal՚s calculator, which represents the help position of digit with the help of gears in it.

Leibniz Calculator

In the year 1671, a German mathematics, Gottfried Leibniz modified the Pascal calculator and he developed a machine which could perform various calculation based on multiplication and division as well.

Analytical Engine

• In the year 1833, a scientist from England knows to be Charles Babbage invented such a machine.
• This device was called Analytical engine and it deemed the first mechanical computer.
• For this great invention of the computer, Sir Charles Babbage is also known as the father of the computer.

Classification of Computer

Classification on working system

• Historically computers were classified according to processor types because development in processor and processing speeds were the developmental benchmarks.
• All modern computers and computing devices use microprocessors whose speeds and storage capacities are skyrocketing day by day.