AARD

AARD may refer to:


 * AARD code, a segment of code in a beta release of Microsoft Windows 3.1 that would determine whether Windows was running on MS-DOS/PC DOS or third-party DOSes
 * Angat Afterbay Regulator Dam, a fixed type river weir without gates upstream from the Bustos Dam
 * AARD (gene), from List of human protein-coding genes 1