10) defragmentations

In the context of administering computer systems, defragmentation is a process that reduces the amount of fragmentation in file systems. It does this by physically organizing the contents of the mass storage device to store files in a contiguous region if possible, or in the smallest possible number of regions (fragments) if not. It also attempts to create larger regions of free space using compaction to impede the return of fragmentation. Some defragmenters also try to keep smaller files within a single directory together, as they are often accessed in sequence. Source: http://en.wikipedia.org/wiki/Defragmentation