apple.com is running what?!

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After seeing apache now runs 56% of the internet and apple includes it in os X. I wondered what the apple site was running.
Here is what I found from netcraft.com
http://uptime.netcraft.com/up/graph?site=apple.com&submit=Examine

OK it seems the site is running on the Solaris OS
and is using the Netscape-Enterprise/3.6 server software.

Shouldn't this be OS X server running apache 2.X?

PLEASE explain.

 

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netcraft.com says WWW.apple.com is running Apache/1.3.9 (Mac OS X Server) on MacOSX.
Much better but could still be boosted to 2.X for apache

mac.com also comes up as running the netscape server software AS WELL as www.mac.com so I am still baffled.