ALCO is the home company which introduced WDM-1, WDM-2 to Indian Railways decades back.
After the Transfer of Technology Agreement, DLW started making Diesel locos for India.
ALCO has ceased completely, but the name remains immortal til date.
ALCO has created many locos like Diesel Locos, Electro Motive Diesels, Gas Turbine n also famous for the Big Boy n Challenger Steam locos.