Useful characteristics of computers
1. Speed :
The computer present in the modern world has the speed of nano and pico second. The various speed that are used by the computers from the former generations are as follows:
1 milli second=1*10^-3 second
1 micro second=1*10^-6 second
1 nano second=1*10^-9 second
1 pico second=1*10^-12 second
2. Accuracy: The accuracy of computers is quite high. They are reliable and robust. It ever makes a mistake. Most probably the error occurs due to the user rather than the computer. There may be certain hardware mistake but with the advanced technique in hand they are overcome.
Example:Only accurate robots are used to perform the operations for the patients since human hands are not flexible for making operations.
3. Diligence: Unlike human beings, computers are persistent and are not afflicted by tiredness, monotony, lack of concentration, etc.
If there are surplus amount of executions to be made then each and every execution will be executed at the same time period. They can perform their assigned task without taking any refreshment.
Example: Computers which are used for controlling the satellites.
4. Reliability: Computers produce reliable and precise results. Humans cannot work with such precision. The computers are automatic. It may execute the process without any intervention of user once they are assigned to a work. Once the data or instruction are fetched from the secondary devices such as optical disks, hard disks etc. Immediately they get stored into RAM (primary memory) and then sequentially they get executed.
5. Versatility: Computers can work with different types of data like sound, graphics, audio, etc. In our day to day life computers has been a part, with their extended flexibility they are used, all over the world. They can be used as personal computers, for home uses, for business oriented tasks, weather forecasting, space explorations, teaching, railways, banking, medicine etc. All Modern computer can perform different kind of tasks simultaneously.
6. Memory: Computers can store large amounts of data for years till a hardware failure occurs.
Secondary storage devices are the key for the data storage. They store the data for which the user wants to retrieve these data for future use. The examples for various secondary devices are Floppy disk, Optical disks (CS and DVD), Zip drives, Thumb drives etc. The data of smaller size can be easily fetched and they can be copied to the primary memory (RAM).
Example: Data Warehousing made by IBM.
Computers today have the following limitations:
1. No IQ : Computers possess no intelligence of their own. They do what they are instructed to do. They do not have brains and hence cannot think.
2. No feelings: Since computers cannot think, they also do not have any feeling.