Mac OS X Mountain Lion Introduction Quick Reference
Starting an App (a Program); Using the Secondary/Right Click; Connecting to a Wi-Fi Network; Opening Files & Folders, Working with Windows; Ending Your Computer Session.
Using Dashboard & Widgets; Using Stacks (Folder Shortcuts in the Dock); Accessing Recently Used Files, Apps, or Servers; Switching Between Running Apps or Windows; Quitting an App; Quitting a Frozen App; Adding an App to the Dock.
Adding a Printer; Searching with Spotlight; Using Dictation; Using Notifications.
Using the File System: Changing Views; Renaming Files or Folders; Sorting Files and Folders; Previewing Files Using Quicklook; Selecting Multiple Items; Moving or Copying Files or Folders; Quickly Sharing Files or Folders; Creating a Folder; Compressing Files or Folders; Deleting Files or Folders; Burning to a CD/DVD. Converting a File to a PDF.
Installing New Apps: Signing In to the App Store, Finding and Installing Apps in the App Store, Updating Apps Purchased in the App Store, Other App Sources.
Using the System Preferences; Changing Login Password.
Includes a List of Keyboard Shortcuts and links to blog posts for more detailed subjects.