Right now, Oracle manages 2 prods.
Oracle8i and Oracle9i Application Server.
O9iAS was Oracle internet Application Server, what was Oracle Application Server....what'a mess!!
Anyway.
If you, right now, buy Oracle9i Application Server Enterprise Edition, you will have
-Apache HTTP Server
-Forms Server
-Reports Server
-Discoverer Plus
-PERL, CGI, JSP, PSP, etc.

Download it and install it in a different Oracle Home.