Just doing some PowerShell stuff to forget I could have been in Las Vegas for MMS 2010, I stumbled on this PowerShell Quick Reference.

Quick reference guide to commonly-used Windows PowerShell commands.

For best results, open the file in Microsoft Word, print the contents to legal-sized paper (8 inches by 14 inches), and fold the resulting printout in half, making a four-page booklet.

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Download here.