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
Green Book (CD standard) on CD-i tracks, as well as certain specific files that are required to be present in a CD-i compatible disc. The CD-i Ready format is a type of bridge format, also designed by Philips, that defines discs compatible with CD Digital audio players and CD-i players. This format puts CD-i software and data into the pregap of Track 1. The CD-i Bridge format, defined in Philips' White Book, is a transitional format allowing bridge discs to be played both on CD-ROM drives and on CD-i players. Green Book (CD standard) The "Green Book", formally known as the "CD-i Full Functional