Now Computers have also been included in the race of good friends because now they have ability to understand your mood. Recently those computer programs have been made which have the ability to completely sensitize about the mood of the user of the computer which changes in every second, this program can completely apprise about your mood whenever you are happy or you are in sad mood and whenever you are worried about anything.

Ref: http://www.telegraph.co.uk/science/steve-jones/7130434/Computers-that-understand-how-you-feel.html