Many systems, particularly those using either a Micro Channel Architecture (MCA), Extended Industry Standard Architecture (EISA) or Peripheral Component Interconnect (PCI) bus, include a setup program which is provided on a bootable floppy disk, in the BIOS, or as a hidden file on the hard disk. This program configures the permanent memory on your computer to describe the system hardware setup. Whenever you add a hard disk, serial card, or other device, you may need to run your setup program to tell your computer about the new hardware. Some computers automatically recognize the presence of new hardware. The documentation provided with your computer's hardware should tell you if you need to run a setup utility.