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 BIOS settings for your PC are not stored in the system memory or hard disk. Instead, they are stored in a special reserved memory area that is commonly called the CMOS Memory. A battery provides backup so that the settings are not lost when the PC is turned off or unplugged.