OneNote is Microsoft's answer to the more popular Evernote.
With OneNote, you can take notes -- hand written via stylus or typed, clip pictures, web pages, files etc.
All notes are auto synched to your microsoft OneDrive (in the 'cloud'). You can then access via one note app (Available for Droid & iOS devices) or program on any other device.
Notes can be organized into 'notebooks'
NOTE: Full OneNote 2013 is installed on your surface as well.
See:
http://bit.ly/1MMRJJE