The need for network management has always been recognized. At the same time, it was recognized as both overhead to selling equipment as well as a facility to smooth over the shortcomings of the equipment. Most datacomm networks in the 1970s and before were fairly small, often using equipment from a single vendor. Network management stations, then called network control, were sold as a loss leader: Sell the razor cheap (or free), they buy more blades. As the 70s progressed, networks were not only getting larger but more and more diverse.