Powershell + Get count of CPU's

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Powershell getting physical CPU's - SQLMASTER Blog

Q. How can I query processor cores or sockets using PowerShell?

http://mctexpert.blogspot.com/2011/06/how-to-determine-number-of-physical.html

There seems to be a bit of a debate on the internet about this one.

How to determine the number of physical processors on a client in PowerShell.

very simple code for counting physical* CPUs

http://social.technet.microsoft.com/Forums/en-US/winserverpowershell/thread/860b8fb9-90ba-4390-ba89-03c253a2c2af/

what is the OS?