This article lists in chronology and provides additional details of incidents in which a firearm was discharged at a school infrastructure or campus in the United States, including incidents of shootings on a school bus. The following is a list of presently-operating bus transit systems in the United States with regular service. The list excludes charter buses, private bus operators, paratransit systems, and trolleybus systems. community college programs. collections offered in this website include the following information: community colleges by state, index to programs, and selected programs.