3AM is an American reality documentary series about the late-night life of New York City. The voyeuristic documentary series puts the spotlight on the lives of five New York citizens and veterans to the city's night life. The series debuted on the premium cable channel Showtime on May 28, 2015. Showtime continued to air a 7 episode-long first season. The season finale aired on July 9, 2015.3AM was met by critics with a mixed reception. The series has been praised for its provocative visual style, but has also been received as mildly entertaining.After its initial 7-episode run, Showtime cancelled the show in January 2016.

3Com Corporation was a digital electronics manufacturer best known for its computer network infrastructure products. The company was co-founded in 1979 by Robert Metcalfe, Howard Charney, Bruce Borden, and Greg Shaw and recruited Bill Krause from Hewlett-Packard to be its president in February 1981 when it raised its first round of venture capital. Metcalfe has explained that he came up with the name 3Com as a contraction of "Computer Communication Compatibility", with its focus on deploying the Ethernet technology that he had co-invented, which enabled the networking of computers.3Com provided network interface controllers and switches, routers, wireless access points and controllers, IP voice systems, and intrusion prevention systems. The company was based in Santa Clara, Calif., USA. From its 2007 acquisition of 100 percent ownership of H3C Technologies Co., Limited (H3C) —initially a joint venture with China-based Huawei Technologies—3Com achieved a leading market presence in China, and a significant networking market share in Europe, Asia, and the Americas. 3Com products were sold under the brands 3Com, H3C, and TippingPoint.On April 12, 2010, Hewlett-Packard completed the acquisition of 3Com. Since the acquisition, 3Com has been fully absorbed by Hewlett-Packard and no longer exists as a separate entity.

3C 273 is a quasar located in the constellation Virgo. It was the first quasar ever to be identified.It is the optically brightest quasar in the sky (m ~12.9), and one of the closest with a redshift, z, of 0.158. A luminosity distance of DL = 749 megaparsecs (2.4 Gly) may be calculated from z. It is also one of the most luminous quasars known, with an absolute magnitude of −26.7, meaning that if it were only as distant as Pollux (~10 parsecs) it would appear nearly as bright in the sky as the Sun. Since the sun's absolute magnitude is 4.83, it means that the quasar is over 4 trillion times more luminous than the Sun at visible wavelengths. The mass of its central black hole has been measured to be 886 ± 187 million solar masses through broad emission-line reverberation mapping.

3AK is the call sign of SEN 1116, and earlier the on-air name of a former Melbourne talk-back radio and music station, which, in 2003, leased its licence to sports network SEN 1116. A number of unusual events and precedents throughout the station's history make its story of unusual interest. These events include (but are not limited to):In lieu of a "C" class licence, the granting of a "B" class licence in 1931, but with limiting conditions including: a position on the dial that could not be picked up by most contemporary radio sets; only allowed to broadcast when other Melbourne commercial stations were off the air, that is, most of the time only at night; limited power.The founder of the station was George F. Palmer, the father of Clive Palmer.The sharing of its wavelength with 2BS Bathhurst, a station that was comparatively close geographically, thus causing interference problems.From 1954, permitted to broadcast during daylight hours, but only when its signal was perceived not to interfere with that of 2BS.Purchased in 1961 by Australian Consolidated Press and thus affiliated with GTV-9. Most high-profile GTV personalities also broadcast on 3AK.When some FM licences were auctioned off to existing AM stations in 1989, 3AK became one of the two successful Melbourne bidders, but the station did not take up the offer because of ownership changes.In 1990, purchased by Peter Corso. 3AK thus became an Italian language station for some years.In late 2003 the 3AK license was leased to Sports Entertainment Network and from January 2004 it became a 24-hour sports station, using the on-air name SEN whilst having to retain 3AK as its official callsign.^ Carty, Bruce (2011). Australian Radio History. Bruce Carty. ISBN 978-0-646-55581-2. ^ Iprimus^ Clive Palmer Having It All