170GlossaryTECHNICAL NOTE: Some features defined in thisglossary may not be available on your computer.AcronymsThe following acronyms may appear in this User’s Guide.AC Alternating CurrentBIOS Basic Input/Output SystemBD-ROM Blu-ray Disc Read-Only Memorybps bits per secondCD Compact DiscCD-ROM Compact Disc Read-Only MemoryCD-RW Compact Disc Rewrite MemoryCMOS Complementary Metal-Oxide SemiconductorCPU Central Processing UnitDC Direct CurrentDMA Direct Memory AccessDIMM Dual Inline Memory ModuleDOS Disk Operating System