Has anyone defined each of the key=value items in the CSE URL?

I'd like to know what the value for the "n=" key=vale means
http://www.killersurflinks.com/index.php?option=com_googlesearchcse&n=30&Itemid=481&cx=partner-pub-1901463039194120%3A1050969907&cof=FORID%3A11&ie=ISO-8859-1&q=surfing+videos&sa=Search&hl=en&safe=active

I have defined a few, can anyone finish?

n=30 (?)

itemid=481 - (Joomla Item Id)

cx=partner-pub-1554663039543520%3A1050969907 - (Google PartnerID

cof=FORID (?)

ie=ISO-8859-1 (?)

q=surfing+videos (search key phrase)

sa=Search (?)

hl=en (Language)

safe=active (Setting the search as safe or not)