Plaintiff employees acted as customer service representatives who spoke with customers by telephone operated through employer-supplied computers. This decision holds that time spent turning the computers on and booting them up was an indispensable part of the employees’ principal duties and therefore was compensable work time under the FLSA, as amended by the Portal-to-Portal Act. It remands the case to the district court to whether time spent shutting down computers was compensable, whether the time spent booting up and down the computers was not compensable under the de minimis doctrine, and whether Connexx had no knowledge of the alleged overtime such that it was not in violation of the FLSA’s overtime requirements.