Meaning of parameters in a Google query?

Question

Are there any ressources on what the parameters in a Google query mean? Any analysis how the Google search pages work internally?

Examples would be

http://www.google.com/#hl=en&source=hp&q=lol&aq=f&aqi=&aql=&oq=&fp=45675624562456

or

http://www.google.com/url?sa=t&source=web&ct=res&cd=11&ved=KJSGHFKSDJF&url=sfdgagasdgasdgasgasg&rct=j&q=fghthwrteghedgf&ei=asdfasdfsa&usg=asdfasdfasf

Answer 1

There is Google websearch parameters cheat sheet.

This page is getting old, but it gives the Meaning of Parameters in a Google Query.

Answer 2

• q=searchstring is the search string
• source=something is where the search originated (www.google.com webpage, Google Toolbar, Quick Search of various browsers)
• ie=utf8 input encoding
• oe=utf8 output encoding
• rls=en ?interface language?

Answer 3

Ok, I used the wrong search terms before. This page lists and explains all the parameters:

http://www.seomoz.org/ugc/the-ultimate-guide-to-the-google-search-parameters.