What is "helios"

Helios was a Unix-like operating system for parallel computers. It was developed and published by Perihelion Software. Its primary architecture was the Transputer. Helios' microkernel implemented a distributed namespace and messaging protocol, through which services were accessed. A POSIX compatibility library enabled the use of Unix application software, and the system provided most of the usual Unix utilities.

Work on Helios began in the autumn of 1986. Its success was limited by the commercial failure of the Transputer, and efforts to move to other architectures met with limited success. Perihelion ceased trading in 1998.

Helios is the personification of the sun in Greek mythology. It may also refer to:

''' Helios-A ''' and ''' Helios-B ''' (also known as and ), are a pair of probes launched into heliocentric orbit for the purpose of studying solar processes. A joint venture of West Germany's space agency DFVLR (70% share) and NASA (30%), the probes were launched from Cape Canaveral, Florida, on Dec. 10, 1974, and Jan. 15, 1976, respectively. Built by Messerschmitt-Bölkow-Blohm as the main contractor they were the first spaceprobes built outside the United States or Soviet Union.

The probes are notable for having set a maximum speed record among spacecraft at 252,792 km/h (157,078 mi/h or 43.63 mi/s or 70.22 km/s or 0.000234 c ). Helios 2 flew three million kilometers closer to the Sun than Helios 1, achieving perihelion on 17 April 1976 at a record distance of 0.29 AU (or 43.432 million kilometers), closer than Mercury ever gets to the Sun. Helios 2 was sent into orbit 13 months after the launch of Helios 1. The Helios space probes completed their primary missions by the early 1980s, but they continued to send data up to 1985. The probes are no longer functional but still remain in their elliptical orbit around the Sun.

"HELIOS" S.A. is a multiplex cinema operator in Poland, established in 1992. It is one of Poland's major cinema operators. Since August 2010, Agora is the owner.

Helios is a design for a spacecraft propulsion system such that small (0.1 kiloton) nuclear bombs would be detonated in a chamber roughly 130 feet in diameter. Water would be injected into the chamber, super-heated by the explosion and expelled for thrust. It was a precursor concept to the Orion project. Like Orion, it would have achieved constant acceleration through rapid "pulsed" operation.

This design would have yielded a specific impulse of about 1150 seconds (compared to a modern chemical rocket’s 450 seconds). However, a number of technical problems existed, most prominently how to keep the combustion chamber from exploding from the great pressures of the atomic detonations.

The Helios propulsion system was conceived originally by Freeman Dyson.

Helios was a brand of camera lenses, made in the USSR. They were usually supplied with Zenit cameras and thus usable with other M42 lens mount cameras such as the Pentax Spotmatic. Some later Helios models were built also for the Pentax K mount.

The Helios-44 and Helios-40 are derivatives of the Carl Zeiss Biotar optical formula. As all lenses based on the Biotar formula, the Helios-44 and Helios-40 produce an unusual "swirly" bokeh effect to the out-of-focus background. The bokeh "circles" become more elliptical in shape as you move away from the center of the photo. This optical phenomenon gives images rendered by these vintage lenses a distinct character, which has created a cult following among fine art photographers.

Helios, more fully the Helios New Encyclopedic Dictionary ( or: Νεώτερον Εγκυκλοπαιδικόν Λεξικόν Ήλιος), is a general knowledge Greek encyclopaedia. Its publication commenced in 1945 while its second edition was completed in 1960, comprising 18 volumes.

Helios is the fourth studio album by American alternative rock band the Fray. It was released on February 25, 2014 by Epic Records.

Helios is a 2015 Hong Kong-Chinese crime thriller film directed by Longman Leung and Sunny Luk and starring an international ensemble cast from Hong Kong, China, Taiwan and South Korea. The film was released on 30 April 2015 in China and 1 May 2015 in Hong Kong.