PARTS OF COMPUTERKEYBOARD – an input device used to type data.

PARTS OF COMPUTERMONITOR – an output device used to

show the images, on the desktop.

CRT MONITOR LED MONITOR

PARTS OF COMPUTERMOUSE

PARTS OF COMPUTER

MICROPHONE

PARTS OF COMPUTERWEBCAM

PARTS OF COMPUTERSPEAKER

BRIEF HISTORY OF COMPUTERANCIENT 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 COMPUTERTHE PASCALINE

- it could perform addition and subtraction of numbers.

- developed by Blaise Pascal, a french philisopher and mathematician.

BLAISE PASCAL

BRIEF HISTORY OF COMPUTERSTEPPED 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 COMPUTERTHE PUNCHED CARD

- consist of holes that can store information

- invented by JOSEPH JACQUARD

JOSEPHM MARIE JACQUARD

BRIEF HISTORY OF COMPUTERDIFFERENCE 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 COMPUTERANALYTICAL ENGINE

- difference engine was not successful.- Charles Babbage developed this, a more

advanced machine with the help of Ada Lovelace

CHARLES BABBAGE

ELECTRONIC TABULATING MACHINEHOLLERITH 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 MACHINEMARK 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 MACHINEATANASOFF BERRY COMPUTER

- uses vacuum tubes for storage, arithmetic , and logical functions.

- invented by John Vincent Atanasoff

JOHN VINCENT ATANASOFF

ELECTRONIC TABULATING MACHINEELECTRONIC 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 COMPUTERELECTRONIC 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 COMPUTERELECTRONICDELAY 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)1. Atanasoff–Berry Computer

2. ENIAC3. EDSAC4. Mark 15. EDVAC6. IBM 6507. 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