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COMPUTER HARDWARE1. Computer System: End user & Enterprises
computing
2. Computer peripherals: Input, Output & Storage
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COMPUTER HARDWARE
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COMPUTER SYSTEMS: END USER AND ENTERPRISE USER
Computer system is a complete, working computer.
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COMPUTER SYSTEMS: END USER AND ENTERPRISE USER
End user:An end-user of a computer system is one who does not
have any significant contact with the developer of the system.
Enterprise Computing:The main objectives of enterprise computing is to
integrated a company`s primary functions (such as production, scales, services, inventory control, and accounting) to improve efficiency, reduce costs, and help managers make key decisions.
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TYPES OF COMPUTER SYSTEMS
Different types of computer systems are nowadays available for different purposes according the user needs.
Categories such as mainframe, midrange computers and microcomputers are still used to help us express the relative processing power and number of end user that can be support by different types of computer.
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MICROCOMPUTER SYSTEMS
Microcomputers are the most important category of computer systems for businesspeople and consumers.
Some microcomputer are powerful workstation computer (technical workstations) that support applications with heavy mathematical computing and graphics display demands such as computer-aided design (CAD) in engineering, or investment and portfolio analysis in the securities industry.
Some use as network servers.
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MICROCOMPUTER SYSTEMS
Network computers: Network computers are low-cost, networked
microcomputers with no or minimal disk storage. User of NCs depends primarily on internet and intranet
servers for their operating system and Web browser, Java-enabled application software, and data access storage.
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MICROCOMPUTER SYSTEMS
Information Appliances: Information appliances include wireless PDAs and
internet-enabled cellular and PCS phones. It also include wired, telephone-based home appliances
that can send and receive emails and access the Web.
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MIDRANGE COMPUTER SYSTEMS
Midrange systems are primarily high-end network servers and other types of servers that can handle the large scale processing of many business applications.
Although not as powerful as mainframe computers, they are less costly to buy, operate, and maintain than mainframe systems and thus meet the computing needs of many organizations.
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MIDRANGE COMPUTER SYSTEMS
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MAINFRAME COMPUTER SYSTEMS
Mainframe computers continue to handle the information processing needs of major corporations and government agencies with high transaction processing volumes or complex computational problems.
Examples, major international banks, airlines, oil companies, and other large corporations.
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MAINFRAME COMPUTER SYSTEMS
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COMPUTER PERIPHERALS
INPUT
OUTPUT
AND
STORAGE TECHNOLOGIES
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COMPUTER PERIPHERALS
Peripherals is the generic name given to all input, output and secondary storage devices that are part of a computer system but not part of the CPU.
Peripherals devices are those that are help you to communicate with the Central Processing Unit of a computer systems.
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INPUT TECHNOLOGIES
Pointing Devices:
Touch pads mouse
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INPUT TECHNOLOGIES
Pointing Devices:
Trackball
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INPUT TECHNOLOGIES
Pen-Based Computing:
WristPDA
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INPUT TECHNOLOGIES
Speech Recognition Systems:
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INPUT TECHNOLOGIES
Optical Scanning:
LCD Scanner
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INPUT TECHNOLOGIES
Bar coding to manage inventory:
Bar code reader Bar code
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OTHER INPUT TECHNOLOGIES
Magnetic stripe:
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OUTPUT TECHNOLOGIES
Video Output:
CRT Monitor
LCD Monitor
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OUTPUT TECHNOLOGIES
Printed Output:
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STORAGE TRADE-OFFS
o Storage devices are those hardware devices designed to store information.
o These devices are divided into two main types.
1. Primary storage device
2. Secondary storage device
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PRIMARY STORAGE DEVICES
They are also known as internal memory and main memory.
These devices holds memory for shorter period of time.
This type of storage is the fastest type of memory in your computer and is used to store data while it's being used.
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SEMICONDUCTOR MEMORY
Semiconductor memory is an electronic data storage device
It is often used as a computer memory, implemented on a semiconductor-based integrated chips.
It provides the computer working storage which it needs to process any applications.
Specialized memory help improve computer’s performance.
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RAM (RANDOM ACCESS MEMORY):
RAM is the basic type of Semiconductor memory.
It can both read and write, so it is called read/write memory.
It is a volatile memory.
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ROM (READ ONLY MEMORY)
ROM is a non-volatile memory and used for permanent storage.
It can be read but not erased or over written.
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FLASH MEMORY
It is the newest and most innovative form of storage that uses semiconductor memory.
It is a non-volatile memory.
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SECONDARY STORAGE DEVICES
They are also known as external memory and auxiliary storage.
Secondary storage is a storage medium that holds information until it is deleted or overwritten regardless if the computer has power.
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MAGNETIC DISKS
They are the most common form of secondary storage for computer system.
They provide fast access and high storage capacities at a reasonable cost.
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TYPES OF MAGNETIC DISKS
There are several types of magnetic disks. But the two main types are:
Floppy Disks Hard Disk Drives
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MAGNETIC TAPES
Magnetic tape is still being used as a secondary storage medium in business applications.
Magnetic tape devices include tape reels and cartridges in mainframes and mid-range systems.
It can hold more than 200 mega bytes.
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OPTICAL DISKS TECHNLOGIES:
CD-ROM: DVD-ROM:
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Primary Storage
Secondary Storage
A
cces
s Spe
ed In
crea
ses
Stor
age
Cap
acity
dec
reas
es
Cos
t per
Byt
e in
crea
ses
Note how cost increases with faster access speeds but decreases with the increased capacity of storage media
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NEW AMAZING FUTURE COMPUTER
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COMPUTER IN 2020
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DOMINANT ORIENTED STRATEGIC TEAM-MATE
Huzaifa Tariq 4107 Arslan Ashraf 4119 Sheikh Waleed 4240 Hamza Tariq Khan 4122 Osama Hamid 4130
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