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Computer System
M.Faisal Siddiqi
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Computer System
Is a collection
of related
componentsthat have all
been designed
to work
togethersmoothly.
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Watchamacallit?!
Hardware
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Information
- the physical components of the
computer, including the computer itself
and matched peripherals.Software - the programs that run the computer.
Data - are facts, or unorganized raw materials,
which can be made up of words, numbers,images, or sounds.
data that has been processed.
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Watchamacallit?!
Bit - the smallest unit of data that a computer
uses. It can be used to represent two states
of information, such as Yes or No.( 1 / 0)
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Byte - is equal to 8 Bits. A Byte can represent
256 states of information, for example,
numbers or a combination of numbers and
letters. 1 Byte could be equal to one character.
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Bits on Bytes
1 byte = 8 bits
1 kilobyte (K / Kb) = 1,024 bytes
1 megabyte (M / MB) = 1,048,576 bytes
1 gigabyte (G / GB) = 1,073,741,824 bytes
1 terabyte (T / TB) = 1,099,511,627,776 bytes
*A byte may be a letter, character, number etc. (e.g. 1 byte = A )
*BIT is the smallest unit a computer (CPU) can understand. A bit can have only two values: either 1 or 0. A
bit can be implemented in hardware by means of a two state device. Eight bits form abyte.
1 byte = 8 bits, 1 Kilobyte(KB) = 1024 byte, 1 Megabyte(MB) = 1024 KB,
1 Gigabyte(GB) = 1024 MB, 1 Terabyte(TB)= 1024 GB, 1 Petabyte(PB) = 1024TB.
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http://en.wikipedia.org/wiki/Bytehttp://en.wikipedia.org/wiki/Byte7/29/2019 Computer System Presentation
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How big is BIG??
Fact 1: Kilobyte
1 Kilobyte would be
equal to this paragraphyou are reading, whereas
100 Kilobytes would equal
an entire page.
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Fact 2: Megabyte
One of those old 3-1/2 inch floppy disks can
hold 1.44 Megabytes or the equivalent of asmall book.
How big is BIG??
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Fact 2: Megabyte
100 Megabytes might hold a couple volumes
of Encyclopedias.
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650 Megabytes is about the amount of
data that will fit on a CD-ROM disk.
How big is BIG??
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Fact 3: Gigabyte
1 Gigabyte of data is almost twice the amount of data
that a CD-ROM can hold.
How big is BIG??
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1 Gigabyte could hold the contents of about 10 yards ofbooks on a shelf. 100 Gigabytes could hold the entire
library floor of academic journals.
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Fact 4: Terabyte
To put it in some perspective, a Terabyte
could hold about 3.6 million 300 Kilobyteimages or maybe about 300 hours of good
quality video. A Terabyte could hold 1,000
copies of the Encyclopedia Britannica. Ten
Terabytes could hold the printed collection ofthe Library of Congress.
How big is BIG??
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COMPUTER HARDWARE
Computer Hardware means all the
physical parts / components of
computer
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Input Devices
enable users to get
data into the computer
for processing
Computer System Components
Input - getting data into the computer
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Microprocessor is
simply a small
processor fabricated
on a chip of silicon
Computer System Components
Processing - transforming data into
information
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Output devices enableusers to see and/or
produce processed
informations
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Computer System Components
Output displaying the information
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SOFTWARE
Software means all the programs that runs
the computer.
It controls all the hardware parts in
computer.
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What is a Software?
Software refers to any program that tells
the computer system what to do.
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Categories of Software
System Software programs that take
control of the PC on start-up, and then play a
central role in everything that happens within
a computer system by managing,
maintaining, and controlling computer
resources.
Application Software
designed andcreated to perform specific personal,
business, scientific processing tasks.
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System Software
Operating System (OS)
Monitors and controls all input / output and
processing activities within a computersystem. It is a program that controls the PC
hardware and the operation of all other
programs
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Platform is defined by a processor and an
operating system.
PC Platforms
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Software created to run a specific platform
wont run on other platforms.
Most personal computer users choose theWintelplatform, which combines one of the
Microsoft Windows operating system with an
Intel-compatible processor.
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PC Platforms
Modern Wintel platforms, such as Windows
ME and Windows 2000, are backward
compatible, allowing programs written for
earlier Microsoft platforms to be run on
modern systems.
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PC Platforms
Before choosing a platform, consider the
following:
Availability of appropriate commercialapplications software for the platforms.
Compatibility of platform with existing
hardware, software, and expertise
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Application Software
Word Processing
a text editing program, which allows the
user to type, compose and correctmanuscripts without the need to re-type,
when errors changed.
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Application Software
Types of Word Processors
WordStar
Word perfectMicrosoft Word
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Application Software
Electronic Spreadsheet
is a program replacing the traditional financial
modeling tools that offer modern improvementsin ease of creating, editing, and using of
financial models and graphical
representations.
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Application Software
Kinds of Electronic Spreadsheet
Lotus 1-2-3
MS EXCELQUATTRO
FRAMEWORK
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Muhammad Faisal Siddiqi
Good-Luck
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