What is extra money?

It is usually said that I want to earn extra money. I could not understand that what is this extra money meant for? We earn to meet our needs and it never happens that we don't spend on our daily...

''Computer'' A machine which makes very fast and Accurate mistakes

We turn off a computer after completing a job and when afterwards we reopen the file of same job, the message appears that your required file is not available to Win 32 applications. The files are...