Bulletin board system software

FirstClass is a client–server groupware, email, online conferencing, voice and fax services, and bulletin-board system for Windows, macOS, and Linux. FirstClass's primary markets are the higher-education and K-12 education sectors, including four of the top ten largest school districts in the United States (Las Vegas, NV's Clark County School District, Florida's Broward County Public Schools, Hillsborough County Public Schools, and Chicago Public Schools).