"sajid" wrote: plese tell me about this?
what is this?
^^^^^^^^^^^^^^^^^^^^
"This" can be a pronoun in the English language, used to refer to things,
not people.
"This can be an adjective, used to indicate the thing or person at hand.
Ex.: This lathe or this machinist. On other newsgroups: this poem or this
author.

Since you are so eager for enlightenment, you should also learn about
capital letters. Also, in the future, spell it "please," and end a
non-question with a period.

Hope *this* helps.