KEYBOARD – an input device used to type data. PARTS OF COMPUTER KEYBOARD – an input device used to type data.

MONITOR – an output device used to show the images, on the desktop. PARTS OF COMPUTER MONITOR – an output device used to show the images, on the desktop. CRT MONITOR LED MONITOR

PARTS OF COMPUTER MOUSE

PARTS OF COMPUTER MICROPHONE

PARTS OF COMPUTER WEBCAM

PARTS OF COMPUTER SPEAKER

BRIEF HISTORY OF COMPUTER ANCIENT COUNTING MACHINE (ABACUS) - consist of sliding beads on frame used for counters. - originally used in ancient Babylon, China and Europe. CHINESE MERCHANTS

BRIEF HISTORY OF COMPUTER THE PASCALINE - it could perform addition and subtraction of numbers. - developed by Blaise Pascal, a french philisopher and mathematician. BLAISE PASCAL

BRIEF HISTORY OF COMPUTER GOTTFRIED WILHELM LEIBNITZ STEPPED RECKONER - can also perform multiplication, division and extracttion of roots. - invented by GOTTFRIED WILHELM VON LEIBNITZ, a famous mathematician. GOTTFRIED WILHELM LEIBNITZ

BRIEF HISTORY OF COMPUTER THE PUNCHED CARD - consist of holes that can store information - invented by JOSEPH JACQUARD JOSEPHM MARIE JACQUARD

BRIEF HISTORY OF COMPUTER DIFFERENCE ENGINE - calculate huge numbers and produce table of numbers to help ship’s navigation. - designed by CHARLES BABBAGE, the “Father of Modern Computer” CHARLES BABBAGE

BRIEF HISTORY OF COMPUTER ANALYTICAL ENGINE - difference engine was not successful. - Charles Babbage developed this, a more advanced machine with the help of Ada Lovelace CHARLES BABBAGE

ELECTRONIC TABULATING MACHINE HOLLERITH MACHINE - used for calculation of census data. - invented by Herman Hollerith. - formed a company to sold his invention known as International Business Machine (IBM). HERMAN HOLLERITH

ELECTRONIC TABULATING MACHINE MARK I - used mechanical telephone relay switches to store information and processed data on punched cards. - developed by Howard Aiken with a team from IBM HOWARD AIKEN

ELECTRONIC TABULATING MACHINE ATANASOFF BERRY COMPUTER - uses vacuum tubes for storage, arithmetic , and logical functions. - invented by John Vincent Atanasoff JOHN VINCENT ATANASOFF

ELECTRONIC TABULATING MACHINE ELECTRONIC NUMERICAL INTEGRATOR AND CALCULATOR (ENIAC) - the first electronic computer which could perform high speed calculations and could make decisions. - invented byJohn Mauchly and J. Presper Eckert JOHN MAUCHLY & J. PRESPER ECKERT

THE STORED COMPUTER ELECTRONIC DISCRETE VARIABLE AUTOMATIC COMPUTER (EDVAC) - store computer instructions and data in a CPU. - it has the capacity to perform 1,000 calculations/second. JOHN VON NEUMANN

THE STORED COMPUTER ELECTRONICDELAY STORAGE AUTOMATIC COMPUTER (EDSAC) - store computer instructions and data in a CPU. - it has the capacity to perform 1,000 calculations/second. JOHN VON NEUMANN

THE VACUUM TUBE - produce a lot of heat as they have a filament like a light bulb - used in the first computers like the ENIAC, which demanded lots of maintenance because of the heat produced. - John Ambrose Fleming invented the first vacuum tube (1904) - Lee De Forest created the "audion"(1906) Atanasoff–Berry Computer ENIAC EDSAC Mark 1 EDVAC IBM 650 UNIVAC

THE TRANSISTOR (TRANSfer resISTOR) - invented at Bell Laboratories on December 16, 1947 by William Shockley. - the most important electronics event of the 20th century - device designed to act as both transmitter, which converts sound waves into electronic waves, and a resistor, which controls electronic current.

THE INTEGRATED CIRCUITS - developed in 1961 BY Jack Kilby - combined many transistors and other electrical components onto a small silicon chip.

THE MICROPROCESSORS - tiny integrated circuits that contain millions of transistors