Philips is organized into three main divisions: Philips Consumer Health, Well-being (formerly Philips Consumer Electronics and Philips Domestic Appliances and Personal Care) and Philips Professional Healthcare (formerly Philips Medical Systems). The lighting division was spun off as a separate company, Signify N.V. (formerly Philips Lighting prior to 2018). The company started making electric shavers in 1939 under the Philishave brand, and post-war they developed the Compact Cassette format and co-developed the Compact Disc format with Sony, as well as numerous other technologies. As of 2012, Philips was the largest manufacturer of lighting in the world as measured by applicable revenues.