Difference between Crystal Enterprise and other versions of Crystal Reports

Hi Can any one help me in knowing the

Difference between Crystal Enterprise and other versions of Crystal Reports

What is for Crystal Enterprise for?
how is it dfferent from Crystal reports 8.0 etc...

I heared that crystal enterprice is for Web reports?
Can't we generate Crystal reports using Crystal reports 8.0 or next versions on thick client and call it on web?

Again I heard about CSP (Crystal server pages) which version I get this and what is the use?

if you have any link where I can get the info regarding this please help me.

Thanks in advance.
-Pardha

Here is the link to the CR page that has a comparison of
all the different version of CR.

Crystal Reports Edition Comparison

Here is another on CR Enterprise

Crystal Enterprise

HTH