1.1   This recommendation applies to resistors intended for use as laboratory d .c. resistors (hereinafter referred to as “resistors”) comprising single or multiple resistors of accuracy Classes 0.0005 . . . 0.2 (5 ppM . . . 2 000 ppM) and single or multi-decade resistors of accuracy Classes 0.0005 . . . 5 (5 ppM . . . 50 000 ppM).