Historical background of computers, Basic Computer Science

Historical Background

The brief history of the growth of computers is given below:

  1. Abacus:  It was the first mechanical device developed approximately 3,000 years ago, it consists of beads that can slide on wires. Wires represent columns. Right most column is for units, the next is for tens and so on. Various numbers can be represented by pushing appropriate beads. This device could perform simple additions and subtractions.
  2. Pascal Calculating Machine:  In 1642, Pascal devised a calculating machine for calculations. This consisted of a series of wheels having digits of zero to nine around the circumference.
  3. Jacquard Card: This utilized the concept of cards with punched holes. This was used for weaving patterns into fabric using cards with punched holes to guide the warp threads on a loom. This was invented in 1801 by Joseph Marie Jacquard.
  4. Analytical Engine:  In 1833, Charles Babbage developed the concepts for an analytical engine which could perform arithmetic functions on data, reading in from punched cards.
  5. Punched Card: In 1890, Herman Hollerith successfully devised electrical tabulating equipment. A coding scheme which would be punched into cards to represent data was devised by him. Hollerith coding system is used widely even today in the punched card equipment.
  6. Mark-1: Mark-1 was the first general purpose computer developed by Prof. Howard Aiken. It consisted of telephone relays and rotating mechanical wheels. Sequence of instructions were given using a paper tape.
  7. ENIAC: In 1946, ENIAC (Electronic Numerical Integrator And Calculator) was developed. It was a large machine containing 18,000 vacuum tubes, weighed 30 tons, occupied 1,500 sq. ft. space and a small memory of 20 accumulators each capable of storing 10 digits. It did in 1 day what once took 300 days to perform.
  8. UNIVAC: The World’s first commercial data processing machine UNIVAC (Universal Automatic Computer) of 1951, made by Remington Rand Corporation was installed for and used by the US Bureau of Census. It was used 24 hours a day for 12 years, and also is well known for having predicted the victory of President Dwight Eisenhower in the 1952 elections of the US, thus exposing to the general public the uses and capabilities of electronic computer.

 

Over the last years, the computer technology has been significantly developing. There has been tremendous reduction in size while storage capacity, speed and reliability have been increasing. 

Posted Date: 9/14/2012 5:02:44 AM | Location : United States







Related Discussions:- Historical background of computers, Assignment Help, Ask Question on Historical background of computers, Get Answer, Expert's Help, Historical background of computers Discussions

Write discussion on Historical background of computers
Your posts are moderated
Related Questions
Question 1 What are the different kinds of editing? Explain them in detail Question 2 Write a long note on the viewfinder of a camera Question 3 Describe the various typ

Configuration of a PC: Generally, when you think of purchasing a Computer, you first try to exactly know what will be the hardware components such as processor, memory etc. of

If L is a regular language show that L U {a} is regular

WAP TO ACCEPT MARKS OF THREE SUBJECT FOR STUDENT & CALCULATE TOTAL MARKS AND PERCENTAGE

Flowcharting: Flowcharting: A Flowchart is a graphical representation of an algorithm. It can be compared to the blueprint of a building. Just as a building contractor refers

123 is not valid in which base value

Overview of a Computer System There are three major elements in every computer solution. They are:     Data     Hardware     Software Hardware + Softwa

sum of first 100 integers

Explain how ICT can be used for achievement of each of the following business objectives, illustrating your answer with examples: 1. Customer intimacy 2. Low-cost leadership

#que1) Create telephone directory. • The heading should be 16-point Arial font in bold • The rest of the document should use 10-point font size • Other headings should use 10-point