In 1967, the three companies – Nokia, Kaapelitehdas, and Finnish Rubber Works – merged and created a new Nokia Corporation, restructured into four major businesses: forestry, cable, rubber, and electronics. In the early 1970s, it entered the networking and radio industry. Nokia started making military equipment for Finland's defence forces ("Puolustusvoimat"), such as the Sanomalaite M/90 communicator in 1983, and the M61 gas mask first developed in the 1960s. Nokia was now also making professional mobile radios, telephone switches, capacitors and chemicals.