 DOS 2.0 introduced the ability to add a device driver for the ANSI escape sequences – the "de facto" standard being , but others like ,  and are used as well (these are considerably faster as they bypass the BIOS).Slowness and the fact that it was not installed by default made software rarely take advantage of it; instead, applications continued to directly manipulate the hardware to get the text display needed.ANSI.SYS and similar drivers continued to work in Windows 9x up to Windows Me, and in NT-derived systems for 16-bit legacy programs executing under the NTVDM.