A computer is a device operates upon data. It can store, process(manipulate) retrieve data. It does the following manipulation of data 1. Receives, 2. Transfer data, 3.Merging 4. Sorting 5. arranging in desired order 6. Print the data.
It does repetitive order any number of time without monotonous like human.
Process data in fast manner and also with accuracy.
A computer can be considered having two component. 1. Hardware 2. Software
What are the parts of the computer which we are able to see with naked eye physically are HARDWARE
Examples are shown in opposite side. Central Processing Unit , Display Screen Monitor , Key board and the connecting Cables.
Software is a program that run on a computer upon instruction by console operator to get the desired results. It is not a physical item but it resides in the memory unit of the Computer and in boot sector also.
It is a short coded instruction developed and installed in the computer for its running This will be decided by the computer manufacturers. Very simple shot coded language is called Assembly language. It always instruction codes for mostly to move register numbers or register contents only to some other registers to manipulate data feed in computer.
If you want to add two values from two variable and store it in another variable
MOV IM A,B
Now the value from register A moved to B register (say5)
The value from C register is added to B register now (say8) 5+8
Now the B register will have the value of A register + C register. (say13)
Finally the added content value is moved to register A (say13) earlier it has (5)