An ActiveX control is a component program object that can be re-used by many application programs within a computer or among computers in a network. The technology for creating ActiveX controls is part of Microsoft's overall ActiveX set of technologies, chief of which is the Component Object Model (COM).
The Basic Input Output System, usually referred to as BIOS, is software stored on a small memory chip on the motherboard. BIOS is sometimes incorrectly referred to as the Basic Integrated Operating System. BIOS instructs the computer on how to perform a number of basic functions such as booting and keyboard control.
The battery can go flat, the data in the CMOS can be lost by a static electric discharge to the keyboard, or the data can be lost when a new card is plugged into the Bus, or other inside modifications are performed. The information stored in CMOS is required by your computer's Basic Input/Output System, or BIOS. The system BIOS is stored in a 64K by 8 bit wide ROM on the System Board. If the System BIOS was actually accessed from this ROM during normal operation the PC's speed would be greatly reduced.