A specific type of semiconductor technology that requires very little power. The term has been popularized to mean a small storage area where your system keeps track of certain hardware parameters, such as the size of your hard disk, the number of serial ports your computer has, etc. CMOS is also called Setup RAM.
A logic signal that operate from a negative voltage to a positive voltage or at points between the maximum positive and negative voltages. The maximum voltage levels are determined by the manufacturer.