INTRODUCTION TO COMPUTERS

WHAT IS A COMPUTER?
         A computer is an electronic device that takes input such as numbers, text, sound,
image, animations, video, etc., Processes it and converts it into meaningful
information that could be understood, presenting the changed input (processed input)
as output. All numbers, text,sound, images, animations, and video used as input are
called data, and all numbers, text, sound, images, animations and video.

HISTORY OF COMPUTER EVOLUTION INVENTIONS

1. Abacus:

• Inventor- China during 16th century
• First mechanical calculating device

2. Napier's Bones

• Inventor- John Napier in 1617
• Represent graphical structure of calculating result.

3. Pascaline

• Inventor- Blaise Pascal in 1642
• First Mechanical adding machine

4. Card of Holes for Weaving pattern

• Inventor- Joseph Jacquard in 1801
• First Mechanical loom
• Used punched card for the sequence of operation

5. Analytical Engine

• Inventor- Charles Babbage in 1834-71
• First general-purpose computer
• Used for basic arithmetic operations

6. Tabulating machine

• Inventor- Herman Hollerith in 1880
• First Electromechanical machine

7. ENIAC (Electronic Numerical Integrator & Calculator)

• Inventor- JP Eckert & JW Mauchly in 1950
• First Electronic digital computer

8. EDSAC (Electronic Delay Storage Automatic Calculator)

• Inventor- John Von Neuman in 1946-52
• First computer which provided storage capacity

9. UNIVAC (Universal Automatic Computer)

• Inventor- Eckert and Jw Mauchly in 1951
• First general purpose electronic computer with large amount of input & output

10. IBM-650

• Inventor- IBM Company in 1954
• Provided input/output units converting alphabetical and special characters to two-digit decimal code

11. Microprocessor

• Inventor- Intel in 1971
• Called as Intel 4004
• Unit used to measure the speed of a processor- KIPS