System Commander (SC for short) is a graphical boot manager/loader software application developed by VCOM.

The software allowed for multiple operating systems to be installed onto a machine at once, providing a menu from which the user selected the operating system they wished to boot from.

Other software with similar functionality includes NTLDR, LILO, GRUB, and Graphical Boot Manager.

[2][3] A major feature of System Commander is its ability to hide partitions.

[5] Partition Commander was not the only software in this market; PartitionMagic was a recognized alternative.