Computer & Computer Based Technologies
Introduction:
Computer the most important discovery by man which has made miracle and has changed the life of human .There is nothing in the world which can't be done by computers.With the advancement in technology computer is become user friendly and is become a very important part of every age group.
Computer is an electronic machine which can take data from user through input device, process it and gives output through otuput devices. Computer can perform the most difficult task in seconds which will take long time if performed by man.
Characterstics of Computer :
- Versatility : computer can be used for multitasking that means at one time we can perform many tasks.
- Deligent : it does not get tired even after working many days
- Large storage capacity : can store large amount of data in its memory.
- Intelligent : can perform large number of calculation is seconds.even a pc can execute millions of instrucion in one sec.
- long life: computer has long life and it depends on power supply.
Computer is made by man not in single effort it is a long journey of hardwork,dedication and devotion.in the early days of ninteenth century people we have some machines like abacus which can perform some arithmatic calculations.CHARLES BABBAGE the father of computer is the person one who came with the idea of using shaft and mechanical engine for data management in the computer.The first computer can do only arithmatic.Blaise Pascal,Leibnitz have done modification and improved the speed . Genrations of Computer:
1st generation of computer:
1st generations compter makes use of vaccum tubes.They are very big in size,consumes lot of eenergy,produces excess of heat and difficult to maintain. ENIAC was used to perform simple arithmatic calculations.
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2nd generations of computer:
with the discovery of transistors the size of computer reduces and EDSAC was built by william hackert & Mauchy and it is used for scientific calculations.But problem of powers dissapation remain s the matter of concern for the scientist.
3rd generation of computer:
In this generation of computer MOSFET are used which reduces size and heat dissipation .Mainframe computer and Super computers are devloped which are used for military and scientific purposes
4th generation of computer:
The 4th generation of computer is the present generation of computer in which scientist are devloping computers/computer based system by using artificial intelligence and parallel computing. Application of computer : Now days computer is used in every field like education,medical , industrial, defence,research purposes.
Now days we have computers with i-seies processor which have internal architecture based on 64 bit word length,provide enhanced speed, support many i/o external devices.It comes in three version i3,i5,i7.The cache memory of these processor is more as compare to previous intel's processor . Window 7 operating system is currently used with these processor in order to get fast internet access and with the evolution 3g,4g technology it becomes possible to transfer data at 2-8 mbps. In 3g and 4g WCDMA & IMT 2000 techniques is used which is intended to provide video , data transmission at faster rate.With the use of these technology it is possible to form adhoc network i.e. temperary network between devices to transfer data.
In computers bluetooth technology is uesd to form temperary cionnection between devices(mobiles,computer).The range of bluetooth is 10-15 meters.the IEEE 802.11 protocal as used in bluetooth .It uses frequency band of 2-4 ghz IMS band.Now we have "Bluetooth 2.0"
NFC:
The NFC(Near field communication) is a wireless communication technology use to communicate point to point.The NFC is devloped for mobiles.It is used to transfer data and secure bills payment.
In future we will have Wimax by which we can transfer data miles away.It uses IEEE 802.15 protocal.
The technology can be used to transfering data just by touch use wrist computers with biometric sensors .Now days we have system combination of machines with human i.e humanoids.
The embedded systems are also used for perfoming task automatically .They play a major part in robotics and automation industry.the automation in industries has made a significant change productivity of manufacturing goods as well in the profit of companies.
You can check out this video and it will help u to go beyond the bluetooth and take step ahead of others to enjoy this new technology.
