PC enthusiasts have long understood the benefits hard drive partitioning. Dividing a hard drive into several partitions lets you efficiently organize operating systems, programs, and data. Actually, modifying partitions was a difficult and time consuming task. There are two types disk managements, Basic and Dynamic, Windows XP and 2K allows both. Depending on your partition table you can make up to 128 partitions.
If you still have Windows other than 2000 or XP, you got a choice of upgrading it or using PowerQuest's PartitionMagic.