End Google Ads 201810 - BS.net 01 --> Hi All,

Suppose I want to write a web program to find out which websites relevant to my search words, have the number one ranking in all search engines? In other words if I want to find all websites that appear at the top of the search result list that have to do with say "FootBall High Lights", what would I have to consider when writing a web program for such a purpose? I would like the program to go and search all search engines not just Google or Yahoo. Thank you in advance for your help.