Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Computer History

description
by

ivo alves

on 6 September 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Computer History

Computer History
The first computers were people! That is, electronic computers (and the earlier mechanical computers) were given this name because they performed the work that had previously been assigned to people. "Computer" was originally a job title: it was used to describe those human beings (predominantly women) whose job it was to perform the repetitive calculations required to compute such things as navigational tables, tide charts, and planetary positions for astronomical almanacs.
Abacus
A brief Introduction
The abacus was an early aid for mathematical computations. Its only value is that it aids the memory of the human performing the calculation. A skilled abacus operator can work on addition and subtraction problems at the speed of a person equipped with a hand calculator (multiplication and division are slower). The abacus is often wrongly attributed to China. In fact, the oldest surviving abacus was used in 300 B.C. by the Babylonians.
Slide rule
First built in England in 1632 and still in use in the 1960's by the NASA engineers of the Mercury, Gemini, and Apollo programs which landed men on the moon.
Pascal's calculator
In 1642 Blaise Pascal, invented the Pascaline as an aid for his father who was a tax collector. Up until the present age when car dashboards went digital, the odometer portion of a car's speedometer used the very same mechanism as the Pascaline to increment the next wheel after each full revolution of the prior wheel.
Punched Card
In 1801 the Frenchman Joseph Marie Jacquard invented a power loom that could base its weave (and hence the design on the fabric) upon a pattern automatically read from punched wooden cards, held together in a long row by rope. Descendents of these punched cards have been in use ever since
Gem calculator
The GEM calculator is a simple device for the addition of money. Numbers are added by inserting a stylus against the figure and pulling downwards.
Using electricity
Is a device used to amplify, switch or create an electrical signal by controlling the movement of electrons in a low-pressure space.
Vacuum tube
Colossus 1
Colossus I was the world's first programmable computer. Colossus I, was created during World War II by the British to speed up the decryption of German messages encoded
Eniac
Eniac, short for Electronic Numerical Integrator And Computer, was the first general-purpose electronic computer. It boasted speeds one thousand times faster than electro-mechanical machines, a leap in computing power that no single machine has since matched.
Personal computer
A personal computer (PC) is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end user, with no intervening computer operator.
Nowadays
Thank you for your time!!
Hope you enjoyed :)
Ivo Alves
Full transcript