Guess Who is this famous Indian Politician ?

I am a 11 letter Indian politician.
Last 3 letters is part used inside the computer.
4, 5, 6 letters is used to store water..
1, 5, 4 is designing software.
3, 7, 6 is computer company name.
2, 5, 6, 8, 11 is a soap name
Who am I?

Answer : CHIDAMBARAM