Transcript Ch01.ppt

Class Test
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A+ Certification
PC Maintenance and Troubleshooting
Chapter 1
Introduction
(history of computers )
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Chapter Overview
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The Development of the Computer
The Role of a Computer Service Professional
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The Abacus
The abacus board is a mechanical aids used for
counting; it is not a calculator in the sense we use the
word today. The person operating the abacus performs
calculations in their head and uses the abacus as a
physical aid to keep track of the sums, the carrys, etc.
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The Analytical Engine (1822 -1871)
The analytical
engine, an important
step in the history of
computers, it was the
design of a mechanical
general-purpose
computer by the British
professor of
mathematics Charles
Babbage
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It was design to receive instructions from punched
cards, make calculations with the aid of memory
bank and print out solutions to math problems
http://en.wikipedia.org/wiki/Difference_engine
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The First Electrically Driven Computer
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The first practical use of punched cards for data processing is credited to
the American inventor Herman Hollerith, who decided to use Jacquard's
punched cards to represent the data gathered for the American census of
1890
http://www.maxmon.com/punch1.htm
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The Digital Electronic Computer
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1939: Atanasoff-Berry Computer (ABC)
1943: Colossus I
1945: Electronic Numerical Integrator
and Computer (ENIAC)
1960s–1970s: Golden era of the
mainframe computer
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Milestones of Modern Computing
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1971:
1978:
1981:
1986:
1992:
1999:
first 4-bit multiprocessor (MP)— 1 MHz
first 16-bit MP 8086 and coprocessor 8087
first PC by IBM (MS-DOS)—4.7 MHz
first 32-bit computer—80386
first Pentium—i586.
processor speed exceeds 1 GHz
HW1:
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The Role of a Computer Service
Professional
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Technician: troubleshoot hardware and
software
Scholar: continuously update skills and
broaden knowledge
Diplomat: cultivate good customer service
skills
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Chapter Summary
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The abacus was the first computing device.
Charles Babbage conceived the first
mechanical computer.
The first electrical computer computed results
of the 1890 United States census.
The Atanasoff-Berry Computer (1939) was
the first digital computer.
Today’s computer service professional must
be a technician, scholar, and diplomat.
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solving up to 29 linear equations
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The Colossus machines were early computing
devices used by British codebreakers to read
encrypted German messages during World War II.
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ENIAC, short for Electronic Numerical Integrator and
Computer, it was the first large-scale, electronic, digital
computer capable of being reprogrammed to solve a full
range of computing problems
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The 8087 was the first math coprocessor
for 16 bit processors designed by Intel
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The IBM Personal Computer, commonly known as the IBM PC,
was the original version and progenitor of the IBM PC compatible
hardware platform. It was IBM model number 5150
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The Intel 80386 is a microprocessor which was used
as the central processing unit (CPU) of many personal
computers from 1986 until 1994 and later
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Homework1
1- Brief details and picture of the
first Pentium—i586?
2- What is the latest computer in
2010?
Last date to submit the HW (Monday 8/3/2010)
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