Computer services, namely, providing temporary use of on-line non-downloadable software for accessing a searchable database which provides potential participants information for selecting clinical trials in which to participate, and to which sites, sponsors and/or contract research organizations can provide information for potential participants in clinical trials, and to which past and active participants can provide ratings of clinical research sites; Software as a service (SAAS) services, namely, hosting software that contains a database of information for use by potential participants for selecting clinical trials in which to participate and to which sites, sponsors and/or contract research organizations can contribute to attract potential participants for their clinical trials, and to which past and active participants can provide ratings of clinical research sites