The information about getting a visa to visit the US is here...
http://travel.state.gov/visa/temp/temp_1305.html
Expect an interview and fingerprint scans at the US embassy or consulate.
You can look up visa wait times here...
http://travel.state.gov/visa/temp/wait/tempvisitors_wait.php
There is a "visa waiver program" for some countries but it looks like India is not included. Under the VWP you don't need a visa in advance. A document is issued at the border.
http://www.cbp.gov/xp/cgov/travel/id_visa/business_pleasure/vwp/vwp.xm l

