Understanding the boot options

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http://forums.fedoraforum.org – Hi, I have fedora 16 32+ bit installed, which occupies the whole hard drive. Whenever I boot my pc I see these following 4 boot options (as part of the boot menu I guess). But I can only boot to the second option below. What are these options? Are they kernel versions? Fedora 3.3.7-1.fc16.i686.PAE Fedora 3.3.2-6.fc16.i686.PAE Fedora 3.3.0-4.fc16.i686.PAE Fedora 3.2.10-3.fc16.i686.PAE Code: [james@localhost ~]$ uname -a Linux localhost.localdomain 3.3.2-6.fc16.i686.PAE #1 SMP Sat Apr 21 13:02:14 UTC 2012 i686 i686 i386 GNU/Linux [james@localhost ~]$ uname -o GNU/Linux [james@localhost (HowTos)