"Sales", "Net Sales", "Net Revenue", and just plain "Revenue" are all equivalent....

"Sales", "Net Sales", "Net Revenue", and just plain "Revenue" are all equivalent....

...Is this true? In this site, http://boards.fool.com/Message.asp?mid=15627879&sort=postdate it says
Revenues
= Sales
= Net Sales

is this true? would Net Revenues be the same as sales? Thank you for your help!

http://en.wikipedia.org/wiki/Net_revenue

http://en.wikipedia.org/wiki/Revenue

judging from that, net revenu and revenue are not the same, but revenue and sales are?