The Oslo tram network is the tram system in Oslo, Norway. It consists of six lines with 99 stops and has a daily ridership of 132,000. It is operated by Sporveien Trikken AS, a subsidiary of the municipally-owned Sporveien who maintain the track and 72 tram vehicles on contracts with the public transport authority Ruter. The system operates on standard gauge and uses 750 V DC overhead. Depot, workshops and headquarters are at Grefsen. There is also a depot at Holtet that is home to the technical company InfraPartner, which maintains the track for the tram and metro systems in Oslo, and a small office building for Oslo Sporveier.

SL79 is a class of 40 articulated trams operated by the Oslo Tramway of Norway. The trams were a variation of the Duewag trams that had been developed by the German manufacturer since the 1950s. The six-axle vehicles are unidirectional with four doors on the right side. The trams can seat 77 passengers three and four abreast, with an additional 91 people able to stand. Power output is 434 kilowatts (582 hp), provided by two motors on the two end bogies, that supplement a central unpowered Jacobs bogie located under the articulation. The trams are 23.0 metres (75.5 ft) long and 2.5 metres wide. They are capable of 80 kilometres per hour (50 mph) and have standard gauge.