MCA and Philips decided to join forces. They first publicly demonstrated the videodisc in 1972. Laserdisc entered the market in Atlanta, on 15 December 1978, two years after the VHS VCR and four years before the CD, which is based on Laserdisc technology. Philips produced the players and MCA made the discs. The compact disc was jointly developed by Philips (Joop Sinjou) and Sony (Toshitada Doi). In the early 1970s, Philips' researchers started experiments with "audio-only" optical discs, and at the end of the 1970s, Philips, Sony, and other companies presented prototypes of digital audio discs. Bluetooth, a low-energy, peer-to-peer wireless technology was originally developed by Dutch electrical engineer Jaap Haartsen and Swedish engineer Sven Mattisson in the 1990s, working at Ericsson in Lund, Sweden. It became a global standard of short distance wireless connection. In 1991, NCR Corporation/AT&T Corporation invented the precursor to 802.11 in Nieuwegein. Dutch electrical engineer Vic Hayes chaired IEEE 802.11 committee for 10 years, which was set up in 1990 to establish a wireless networking standard. He has been called the father of Wi-Fi (the brand name for products using IEEE 802.11 standards) for his work on IEEE 802.11 (802.11a & 802.11b) standard in 1997. The DVD optical disc storage format was invented and developed by Philips and Sony in 1995. Ambilight, short for "ambient lighting", is a lighting system for televisions developed by Philips in 2002. Philips and Sony in 1997 and 2006 respectively, launched the Blu-ray video recording/playback standard. Dijkstra's algorithm, conceived by Dutch computer scientist Edsger Dijkstra in 1956 and published in 1959, is a graph search algorithm that solves the single-source shortest path problem for a graph with non-negative edge path costs, producing a shortest path tree. Dijkstra's algorithm is so powerful that it not only finds the shortest path from a chosen source to a given destination, it finds all of the shortest paths from the source to all destinations. This algorithm is often used in routing and as a subroutine in other graph algorithms. Dijkstra's algorithm is considered as one of the most popular algorithms in computer science. It is also widely used in the fields of artificial intelligence, operational research/operations research, network routing, network analysis, and transportation engineering.