Cairo-Introduction-What Is Computer System

Cairo-Introduction-What Is Computer SystemIntroduction to Computers

Introduction

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Dr Osama: Introduction to Computers

A World of Computers
What is a computer? Ø computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations.

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Dr Osama: Introduction to Computers

Why you learn introduction to Computers?
Terms: that used to describe computers and its operation. Functions: Learn the functions of different parts of computer system. Uses: How to use a computer to produce the information or perform a task you need done.
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Dr Osama: Introduction to Computers

What is Computer system?

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Dr Osama: Introduction to Computers

What is Computer system?
Computer system: is a combination of six elements
a. Hardware (HW). b. Software (SW). c. Data / Information. d. Procedures. e. People (user/professional) f. communications

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Dr Osama: Introduction to Computers

What is Computer system?
Hardware: Simply means the physical equipments. (without HW, the SW is useless.) Software: Is the term used to describe the instructions that tell the hardware how to perform tasks. Data / Information : data: consists of the raw facts and ready to processed into information. Information: is summarized data or manipulated data or processed data.
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Dr Osama: Introduction to Computers

What is Computer system?
DATA ® Information ® Knowledge ® Meta Knowledge. NB. Meta Knowledge is knowledge about knowledge.

Meta K.

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Dr Osama: Introduction to Computers

What is Computer system?
Procedures: Are description of how things are done, or steps for getting results. Procedures for computer system appears in documentation manuals (reference manual) which contain instructions, rules, and guide lines to follow when use hardware or software.

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Dr Osama: Introduction to Computers

What is Computer system?
People: People operate the computer HW and they create the computer SW also follow certain procedures when using HW & SW. People may be users or Professionals. User (end user): Is a person who has much technical knowledge of computers but who used computers to perform some tasks learning or to have fun. Professional: Is a person who has formal education (courses) in the technical aspects of using computer (SW or HW) as a computer programmer. Communication: The manner in which a various individual computer system are connected by phone lines, microwaves transmitters, satellites with ether computer systems.
Dr Osama: Introduction to Computers

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What is Computer system?
Computer Hardware: Computer’s hardware could be divided into 5 categories: Input hardware: Function: Is to collect data and convert it into a suitable for computer processing as mouse, key board. Output hardware: Function: Is to provide the user with the means to view the processed data (information) by the computer system, output hardware may be hard copy (printer), or soft copy like (screen, monitor).

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Dr Osama: Introduction to Computers

What is Computer system?
Processing hardware: Function: Is to retrieve and execute instruments (SW) that provided to the computer. Processing may consist of performing calculations and other logical activities. The most important essential components of processing HW are: (CPU): Central Processing unit. (RAM): Random access Memory. Registers Volatile: All content are lost when the computer is powered off like (RAM,CPU) Non Volatile: All contents are not lost when computer powered off like (hard disk) 11
Dr Osama: Introduction to Computers

What is Computer system?
Storage hardware: Function: Is to provide a means of storage SW. and data information that is relatively permanent or non volatile, like hard disk and easy to retrieve when needed to process or for processing. Communication hardware: Function: Is to facilities the connections between computers and groups of connected computers (network) like modems, cables, network hard, switches, routers.

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Dr Osama: Introduction to Computers

What is Computer system?
Computer Software: The main classes of Software are: *System Software: Which are; Runes the basic computer operation, Manages computer’s recourses and Enables applications software to run on computer. System Software: like: Windows(2000, XP, Vista, ME), DOS, Linux, Apple Macintosh. *Application Software: Which performs general purpose tasks, for users ex: Word processing SW data base SW, Multimedia SW, and Autocad.
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Dr Osama: Introduction to Computers

What is Computer system?
Types of computers: Super computer: π = 3.14 Main frame Computer, Mini Computer (servers), Micro Computers (PC) (Personal Computer) (480 million Digits after . symbol)

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Dr Osama: Introduction to Computers

What is Computer system?

EDSAC was one of the first computers to implement the stored program (von Neumann) architecture.

The ENIAC, which became operational in 1946, is considered to be the first general-purpose electronic computer

The Zuse Z3, 1941, considered the world's first working programmable, fully automatic computing machine.
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Dr Osama: Introduction to Computers

Introduction to Computers

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Dr Osama: Introduction to Computers

Cairo-Introduction-What Is Computer System 8.7 of 10 on the basis of 1921 Review.