Letter: K
- kernel-2.4.21-37.EL.XFS: The Linux kernel (the core of the Linux operating system)
- kernel-doc-2.4.21-37.EL.XFS: Various documentation bits found in the kernel source.
- kernel-smp-2.4.21-37.EL.XFS: The Linux kernel compiled for SMP machines.
- kernel-smp-unsupported-2.4.21-37.EL.XFS: An extra, unsupported, set of kernel modules
- kernel-source-2.4.21-37.EL.XFS: The source code for the Linux kernel.
- kernel-unsupported-2.4.21-37.EL.XFS: An extra, unsupported, set of kernel modules