Using the command line is always faster than going through graphical menus and windows with mouse clicks.

To find my OS X version using graphical tools, I have to move the mouse to the top left corner to the apple menu, which is not an ergonomic movement with a touchpad. Then click on the apple, select About This Mac, and click.

So much easier using the command line, especially when my hand is already on the keyboard:

$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.9.4
BuildVersion:	13E28

To get even more details:

$ system_profiler SPSoftwareDataType

    System Software Overview:

      System Version: OS X 10.9.4 (13E28)
      Kernel Version: Darwin 13.3.0
      Boot Volume: Macintosh HD
      Boot Mode: Normal
      Computer Name: kronos
      User Name: Janos Gyerik (janos)
      Secure Virtual Memory: Enabled
      Time since boot: 25 days 14:19

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