Philips into two main divisions: Philips Consumer health and 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. Philips has
Philips PM5544 the most commonly used test cards, with only the SMPTE bars, the BBC Test Card F and the Snell & Wilcox Zone Plate coming close to its usage. The Philips Pattern was later incorporated into other test pattern generators from Philips themselves, as well as test pattern generators from various other manufacturers. The BBC occasionally used a slightly modified version called Test Card G from 1971 until the late-1990s in conjunction with Test Card F, and although it was also used by the IBA in the 1970s it eventually abandoned the Test Card G and developed its own test card