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Transcript of Computer Hardware
referred to the different generations of computing devices
first generations of computers
first generation computing
vacuum tubes are used in the first generation computers
semiconductor device are used in second generation PCs
third generation computing
integrated circuits are used in third generation PCs
1964 to 1971 Third generation computers were developed
fourth generation computing
relies on the use of LSI (large-scale integration) and VLSI (very-large-scale integration)
After 1971 the fourth generation computers were built
fifth generation computing
was to be the end result of a massive government/industry research project in Japan during the 1980s
are in developmental stage which is based on the artificial intelligence
CLASSIFICATION TO COMPUTER HARDWARE
the four classifications of computer
Micro computer or personal computer
Micro computer in 1960s and 1970s
micro computer grew and popularity
Industrial process - control and manufacturing (CAM)
Computer - aided design (CAD)
telecommunications processing and network management
data warehouse management
on-line analytical processing
powerful computer system
major international banks
RISK (Reduced Instruction Set Computer
extremely powerful computer system
massive numeric computations
Computer System Concept
More than a high – powered collection of electronic devices performing a variety of information processing chores.
A system with an interrelated combination of components that performs the basic system functions.
Provides users with a powerful information - processing tool.
Basic System Functions
Converts data into electronic machine – readable form for direct entry or through telecommunications link into a computer system.
Input of a computer system includes:
The Central Processing Unit (CPU) is the main processing component of a computer system. The electronic circuits of the Arithmetic Logic Unit (ALU) performs the arithmetic and logic functions required in computer processing.
Processing of a computer system includes:
Converts electronic information produced by the computer system into human – intelligible form for presentation to end users.
Output of a computer system includes:
Takes place in the storage circuits of the computer’s primary storage unit, or memory, and in secondary storage devices. These devices store data and program instructions needed for processing.
Storage of a computer system includes:
It is the control component of the computer system. Its circuits interpret computer program instructions and transmit directions to other components of the computer system.
The Categories of Computer hardware
Electronic bulletin board system
is an on-line service that allows people to communicate with others on topics of common interest
ELectronic mail (EMS/e-mail)
is said to offer of advantages of speed and versatility over its conventional rivals and to combine the best features of telephone and paper communication.
-text manipulation facilities
-a variety of message formats
-communication over long time
-ability to receive messages
ability to route messages
video messaging systems
one video-messaging system is video conferencing.
a computer online services is a commercial information service.
other internet features
HARD COPY OUTPUT DEVICES
SOFT COPY OUTPUT DEVICES
In1947 three scientist invented the transistors. John Bardeen, William Shockey, and Walter Brattain working at AT&T's Bell Labs.
source: THIRD GENERATION COMPUTERS http://latesttechnomanias.blogspot.com/2010/06/third-generation-computers.html
SOURCE: FOURTH GENERATION COMPUTERS http://latesttechnomanias.blogspot.com/2010/06/fourth-generation-computers.html
SOURCE: FIFTH GENERATION COMPUTERS http://latesttechnomanias.blogspot.com/2010/06/fifth-generation-computers.html