finding CPU count - reading sysinfo output

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http://www.unix.com – Hello, sysinfo throws out below 3 CPU counts. Can anyone help me understand what each of these means? Code: CPU Count Socketed is          2 CPU Count Physical is          8 CPU Count Virtual is            16 First one seems obvious. However, I wonder how there can be 8 Physical CPUs, if only two were socketed? Does it mean each CPU has 4 cores? No clue about Virtual CPUs though. I couln't find much info on sysinfo man page nor on the web. If there exist any pages, do point me to such. Thanks Har (HowTos)