The performance of service tasks on behalf of individuals (such as clients) among agents in a service industry, such as a home healthcare services industry or a lodging service industry, may be difficult due to the quantity, variety, and details of such service tasks. A service task facilitator device may be devised that facilitates the performance of service tasks by such agents in a convenient manner. A service task coordinating system may also be devised for coordinating the performance of service tasks among such agents through the administration of such service task facilitator devices. The service task facilitator devices and coordinating system communicate with users (including agents) through a lexicon of icons of predominantly pictorial form chosen to describe the nature and details of the service tasks within the service industry. The use of a lexicon of pictorial icons facilitates such communication in an easily recognizable and language-independent manner.