Toshiba Satellite Pro 4300 User Manual - Page 219

L level 2 cache: See cache. Light Emitting Diode (LED): A semiconductor device that emits light when a current is applied. Liquid Crystal Display (LCD): Liquid crystal sealed between two sheets of glass coated with transparent conducting material. The viewingside coating is etched into character forming segments with leads that extend to the edge of the glass. Applying a voltage between the glass sheets alters the brightness of the liquid crystal. LSI: Large Scale Integration. 1) A technology that allows the inclusion of up to 100,000 simple logic gates on a single chip. 2) An integrated circuit that uses the large scale integration. M main board: See motherboard. maths co-processor: A circuit built into the processor that is dedicated to intensive math calculations. MDA: Monochrome Display Adaptor. A video display protocol defined by the IBM Monochrome Display Adaptor and its associated circuitry for direct drive TTL displays that supports a monochrome 720x350 text mode. megabyte (MB): A unit of data storage equal to 1024 kilobytes. See also kilobyte. megahertz: A unit of wave frequency that equals 1 million cycles per second. See also hertz. menu: A software interface that displays a list of options on the screen. Also called a screen. microprocessor: A hardware component contained in a single integrated circuit that carries out instructions. Also called the central processing unit (CPU), one of the main parts of the computer. million byte: A unit of data storage equal to 1,000,000 bytes. MMX: Refers to microprocessors with additional instructions beyond the x86 standard. The instructions were developed on the basis of multimedia code requirements and thus improve the performance of multimedia applications. User's Manual Glossary 9