The mainline Protestant churches (sometimes also known as oldline Protestants) are a group of Protestant denominations in the United States and Canada largely of the theologically liberal or theologically progressive persuasion that contrast in history and practice with the largely theologically conservative evangelical, fundamentalist, charismatic, confessional, Confessing Movement, historically Black church, and Global South Protestant denominations and congregations.

an automobile which was produced by Ford in the United States in the models years 1952 to 1956.John

Although steam locomotives were withdrawn from normal railway service in Great Britain in 1968, due to sustained public interest including a locomotive preservation movement, steam hauled passenger trains can still be seen on the mainline railway (i.e. Network Rail owned tracks as opposed to heritage railways) in the present day.

the name given to the Kademlia-based distributed hash table used by BitTorrent clients to find peers via the BitTorrent protocol.