Once a man went to buy a parrot.....
Man: These parrots seem nice, but show me the best and healthy ones....
Shopkeeper: Sure sir, I have three best parrots.....
Soon the shopkeeper brought those 3 parrots.....
Man: How much each of them costs...??
Shopkeeper: The 1st parrot costs 1000$, 2nd parrot costs 2000$ and the 3rd parrot costs 5000$.
Man: Thats intersting, but why so expensive....??
Shopkeeper: The 1st parrot can speak many languages and even knows about Windows XP.....
Man: Wow...What about the second parrot...??
Shopkeeper: Well he also knows many languages, plus he knows some things about Windows XP and Linux Operating System....
Man: Thats amazing....What about the 3rd one...Why he costs $5000....?? Which languages he knows...??
Shopkeeper: Well, frankly speaking, he just fires bad words and doesn't know anything, but the other two parrots call him"BOSS......!!"