A merican N ational S tandards I nstitute. It is a US business group that sets the standards - it is a voluntary organisation. ANSI is frequently seen in 3 areas:-
Programming Languages - FORTRAN, COBOL & C conform to ANSI
SCSI
ANSI.SYS Device Driver . Available in DOS - it enables the use of ANSI defined commands (using the escape key) to control the screen & the keyboard