Variations in the system hardware are hidden by the BIOS from programs that use BIOS services instead of directly accessing the hardware. MS-DOS (PC DOS), which was the dominant PC operating system from the early 1980s until the mid 1990s, relied on BIOS services for disk, keyboard, and text display functions.
Definition of efflorescence. 1  1a : the action or process of developing and unfolding as if coming into flower : blossoming periods of â¦ intellectual and artistic efflorescence â Julian Huxleyb : an instance of such developmentc : fullness of manifestation : culmination. 2  2 : the period or state of flowering.
The emission of light that does not derive energy from the temperature of the emitting body, as in phosphorescence, fluorescence, and bioluminescence. Luminescence is caused by chemical, biochemical, or crystallographic changes, the motions of subatomic particles, or radiation-induced excitation of an atomic system.