 After installing the Magnetronic Reservisor, Teleregister produced a number of different versions for a variety of customers.A number of customers bought Magnetronic Reservisor systems, including Braniff International Airways, National Airlines, Atchison, Topeka & Santa Fe Railroad and New Haven Railroad.Modified versions, larger or smaller, were also sold as the United Airlines' "UNISEL", New York Central Railroad's "Centronic", and a variety of warehousing and hotel room availability systems.