The Manila Railroad Company (MRR) acquired its first multiple units in the 1930s. The locally-built MC class was initially powered by gasoline and was changed to diesel during World War II. Both the MRR and its successor, the Philippine National Railways (PNR), has since acquired various classes of diesel multiple units. All multiple units owned by MRR and all of the older MUs of the PNR were built by Japanese firms. On the other hand, its newer rolling stock were built in South Korea and Indonesia. There will also be DMUs that will be built in China.