Introduction to computer Important events in computer history Introduction to computer SLIDE # 02 of BILAL TEACH If you want FREE Educational Videos Subscribe Our Channel. Here we will post FREE Educational, knowledge based video for everyone. Stay tuned for FREE Educational Videos LECTURE # 3 = https://youtu.be/fyjtzHSHVCs?list=PL5d_j41S1-UvoJF5PWVxqv73x77G1aEbP

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2. IMPORTANT EVENTS
TRANISTOR – 1947
 Invented by
1. William Shockley (13 Feb 1910 – 12 Aug 1989),
2. John Bardeen (23 May 1908 – 30 Jan 1991), and
3. Walter Houser Brattain (10 Feb 1902 – 31 Oct 1987)
at the Bell Labs in the US
 Compared to vacuum tubes, it offered:
 much smaller size
 better reliability
 much lower power consumption
 much lower cost
 All modern computers are made of miniaturized transistors
 Tubes replaced mechanicals
 Transistors replaced tubes
1 2 3

3. IMPORTANT EVENTS
EDVAC – 1948
 Electronic DiscreteVariable Automatic Computer
 Built by J. Presper Eckert(9 April 1919 – 3 June 1995) & John Mauchly
(30 Aug 1907 – 8 Jan 1980) and included many design ideas proposed by
Von Neumann
 The first electronic computer design to incorporate a program
stored entirely within its memory
 First computer to use MagneticTape for storing programs.
Before this, computers needed to be re-wired each time a new
program was to be run
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4. IMPORTANT EVENTS
FLOPPY DISK – 1950 (Yoshiro Nakamats)
 Invented at the Imperial University in Tokyo by Yoshiro
Nakamats(26 June 1928 – Not Known)
 Provided faster access to programs and data as compared
with magnetic tape

5. IMPORTANT EVENTS
UNIVAC 1 – 1951
 UNIVersal Automatic Computer
 Eckert(9 April 1919 – 3 June 1995) & Mauchly(30 Aug 1907 – 8 Jan 1980) Computer
Company
 First computer designed for commercial apps
 First computer that could not only manipulate numbers but text
data as well
 Max speed: 1905 operations/sec
 Cost: US$1,000,000
 5000 tubes. 943 cu ft. 8 tons. 100 kilowatts
 Between 1951-57, 48 were sold
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6. IMPORTANT EVENTS
COMPILER – 1952 (Grace Hopper)
 Grace Hopper(9 Dec1906 – 1 Jan 1992) of US Navy develops the
very first high-level language compiler
 Before the invention of this compiler, developing a
computer program was tedious and prone to errors
 A compiler translates a high-level language (that is easy to
understand for humans) into a language that the computer
can understand

7. IMPORTANT EVENTS
BASIC – 1965
 Beginner All-purpose Symbolic Instruction Code
 Developed by
Thomas Kurtz(22 Feb 1928 – Not Known) &
John Kemeny(31 May 1926 – 26 Dec 1992)
at Dartmouth College
 The first programming language designed for the non-techies
 The grand-mother of the most popular programming language in the
world today –Visual BASIC
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8. IMPORTANT EVENTS
COMPUTER MOUSE – 1965 (Douglas Englebart)
 Invented by Douglas Englebart(30 Jan 1925 – 2 July 2013)
 Did not become popular until 1983, when Apple Computers
adopted the concept

9. IMPORTANT EVENTS
ARPANET – 1969
 A network of networks
 The grand-daddy of the today’s global Internet
 A network of around 60,000 computers developed by the US Dept
of Defense to facilitate communications between research
organizations and universities

10. IMPORTANT EVENTS
Intel 4004 – 1971
 The first microprocessor
 Microprocessor:A complete computer on a chip
 Speed: 750 kHz

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