SyStem> (VxD) A device driver under {WindowS 3.x}/{WindowS 95} running aS part of the {kernel} and thuS having acceSS to the memory of the kernel and all running proceSSeS aS well aS raw acceSS to the hardware. VxD' S uSually have the filename extenSion .386 under WindowS 3.x and .vxd under WindowS 95. VxD' S written for WindowS 3.x can be uSed under WindowS 95 but not vice verSa. (1997-02-27)