1 A+ Certification PC Maintenance and Troubleshooting Chapter 1 Introduction (history of computers )

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A+ CertificationPC Maintenance and Troubleshooting

Chapter 1Introduction

(history of computers )

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Chapter Overview

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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http://en.wikipedia.org/wiki/Difference_engine

It was design to receive instructions from punched cards, make calculations with the aid of memory bank and print out solutions to math problems

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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 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 1971: first 4-bit multiprocessor (MP)— 1 MHz 1978: first 16-bit MP 8086 and coprocessor

8087 1981: first PC by IBM (MS-DOS)—4.7 MHz 1986: first 32-bit computer—80386 1992: first Pentium—i586. 1999: processor speed exceeds 1 GHz

HW1:

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The Role of a Computer Service Professional

Technician: troubleshoot hardware and software

Scholar: continuously update skills and broaden knowledge

Diplomat: cultivate good customer service skills

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Chapter Summary 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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1- Brief details and picture of the first Pentium—i586?

2- How The First Electrically Driven Computer works?Last day (Sunday 22/3/2009)

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