Later in the 17th century Gottfried Wilhelm von Leibniz, a famous mathematician, invented a device that could multiply, divide, calculate square roots, as well as addition and subtraction. He called it the Stepped Reckoner.

In 1822, Charles Babbage began to work on the Difference Engine. This device would calculate numbers to the 20th place and then print then 44 digits per minute. The original purpose of this machine was to produce tables of numbers that would be used by ships' navigators. Although never built, the design for the Difference Engine lead to the design of Babbage's Analytical Engine.

The Analytical Engine, designed around 1833, was to perform a variety of calculations by the following set of instructions, or program, stored on punch cards. The engine was to store information in a memory unit that would allow it to make decisions and then carry out instructions. The Analytical Engine was also never built.

The replacement of transistors by integrated circuits (ICs) gave way to the third generation of computers. ICs are also called chips. One IC could replace hundreds of transistors, giving computers tremendous speed to process information.

Hard Disk: Unlike its removable counterparts the hard drive is permanently installed, inside the hard disk drive. Each hard drive may have multiple disks inside and the size of the disks vary and improve and an exponential rate.

Some common words found in the essay are:
Generation Computers, Logic Unit, Data Memory, Memory Address, Analytical Engine, Herman Hollerith, Output Devices, ABC ENIAC, Computer ABC, Output CPU, generation computers, analytical engine, ada byron, hard disk, data stored, stored program, inside base unit, hard drive, represents power, disk drive, magnetic tape, cpu central processing, ibm system 360, drive disk drive, central processing unit,
Approximate Word count = 2205
Approximate Pages = 9 (250 words per page double spaced)