EVOLUTION OF ICT (DATES ONLY)

Pre-Mechanical Period

3000bce-14th century

Mechanical Period

16th century

Electromechanical Period

18th century

Electronic Period

1940-present

3 main events of mechanical period

abacus

pascaline

babbage

abacus (origin)

mesopotamia

abacus (date)

2500bce

pascaline (inventor)

blase pascal

pascaline (date)

1642

babbage (inventor)

charles babbage

babbage (date)

difference 1821

analytical engine designer 1832

3 main events of Electromechanical Period

telegraph

telephone

radio

telegraph (inventor)

william cooke and sir wheatstone

(samuel introduced first single circuit tele. (morse code))

telegraph (date)

1837

(1844)

telephone (inventor)

Alexander graham bell

telephone (date)

1876

Radio (inventor)

Macaroni

Radio (date)

1894

4 main events of Electronic Period

vacuum tube

transistor

integrated circuit

microprocessor

Vacuum tube (ENIAC)

electronic numerical integrator and computer

Transistor (inventor)

John bardeen

Transistor (date)

1947

Integrated Circuit (inventor)

Jack Kilby

Integrated Ciruit (date)

1958

Microprocessor (inventor)

intel

Microprocessor (date)

1971