Engineering extension courses were a series of classes offered by Starfleet Medical Academy. They were designed to give students basic information about technology to supplement their medical training. The courses included information on starship operations. In 2370, Julian Bashir told Miles O'Brien about the engineering extension courses he took while they were hiding from Kellerun forces on T'Lani III. He offered to assist O'Brien with repairing a communications system, but O'Brien declined. (DS9: "Armageddon Game")