Ras or RAS may refer to:

Arts and media

* RAS Records Real Authentic Sound, a reggae record label * Rundfunk Anstalt Südtirol, a south Tyrolese public broadcasting service * Rás 1, an Icelandic radio station * Rás 2, an Icelandic radio station *

Raise A Suilen Raise A Suilen (stylized as RAISE A SUILEN) is a Japanese all-female rock band that is part of Bushiroad's media franchise ''BanG Dream!''. Formed in 2018, the group's members portray fictional characters in the project's anime series and mobile ...

, a Japanese band

Organizations

* Railway Air Services, a UK airline * Rajasthan Administrative Service, India * Remote Astronomical Society Observatory of New Mexico *

Richard Allen Schools Richard Allen Schools (RAS) is a charter school system headquartered in Dayton, Ohio. It operates schools in Dayton and Hamilton. It was named after the founder of the African Methodist Episcopal Church (AME) and a former slave, Richard Allen. H ...

, a charter school system in Ohio, USA * Richardson Adventist School, now North Dallas Adventist Academy * IEEE Robotics and Automation Society *

Royal Air Squadron The Royal Air Squadron (RAS) is a flying club in the United Kingdom founded in 1966 by Peter Vanneck, the Hon. Hugh Astor and Anthony Cayzer - friends who shared a passionate interest in flying light aircraft. Prince Philip was the Squadron's Air ...

, a flying club in the UK * Royal American Shows, an American travelling carnival company operating from the 1920s to the 1990s * Royal Asiatic Society of Great Britain and Ireland * Royal Astronomical Society, UK, founded 1820 * Russian Academy of Sciences

Biology

* RAAS, the renin–angiotensin system, a hormone system that regulates blood pressure * Recurrent aphthous stomatitis or canker sores * Renal artery stenosis, the narrowing of the renal arteries *

Respiratory airway secretory cell The respiratory airway secretory cell (RAS), is found in the lungs of humans and some other mammals, notably ferrets. They are facultative progenitors that have important functional roles in maintaining lung airway health. Their role in maintainin ...

, cells in humans and some other mammals that maintain airway health * Reticular activating system in the brain, regulating wakefulness * Retinoic acid syndrome, a complication of acute promyelocytic leukemia * Ras superfamily, a superfamily of signalling proteins **

Ras subfamily Ras, from "Rat sarcoma virus", is a family of related proteins that are expressed in all animal cell lineages and organs. All Ras protein family members belong to a class of protein called small GTPase, and are involved in transmitting signals ...

, a family of signalling proteins

Science and technology

.ras Sun Raster was a raster graphics file format used on SunOS by Sun Microsystems. The format has no MIME type,.ras MIME type noregisteredat IANA it is specified in @(#)rasterfile.h 1.11 89/08/21 SMI. The format was used for some research papers. ...

, a SunOS raster format * RAS algorithm, an algorithm for iterative proportional fitting in economics * RAS supergroup or SAR supergroup, a plant clade * Recirculating aquaculture system, an aquarium system that filters water rather then requiring new water supplies * Registered Accessibility Specialist, an official in Texas who evaluates accessibility *

Registration, Admission and Status H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network. The H.323 standard addresses call signaling and control, m ...

, a telephony protocol under H.323 * Reliability, availability and serviceability of computer hardware * Remote access service, on a network *

Reusable Asset Specification Reusable Asset Specification is an Object Management Group The Object Management Group (OMG) is a computer industry standardization, standards consortium. OMG Task Forces develop enterprise integration standards for a range of technologies. ...

of software * Row Address Strobe in

dynamic random-access memory Dynamic random-access memory (dynamic RAM or DRAM) is a type of random-access semiconductor memory that stores each bit of data in a memory cell, usually consisting of a tiny capacitor and a transistor, both typically based on metal-oxide ...

* Russian Accounting Standards

People

Ras (surname) Ras is a surname with a variety of origins. In Dutch ''ras'' means "nimble, swift", but it is a patronymic surname: the archaic given name Ras, Raas, or Raes was short for Erasmus or was a derivative the Middle Dutch male name Razo. In Polish or Ser ...

, several people * Ras, the nickname for someone with the given name of Rasmus (given name) * Ra's al Ghul, a fictional villain in Batman media *

Ras Muhamad Muhamad Egar known by his stage name Ras Muhamad (born October 29, 1982) is an Indonesian reggae singer. He took his stage name while a student in Brooklyn, United States. Early life and education Muhamad Egar was born on October 29, 1982, in Ja ...

(born 1982), Indonesian reggae singer * Nicholas Furlong (musician) or Ras *Rassius "Ras" Luine, a character from '' Tales of Eternia''

Other uses

Ras (fascism) Ras or RAS may refer to: Arts and media * RAS Records Real Authentic Sound, a reggae record label * Rundfunk Anstalt Südtirol, a south Tyrolese public broadcasting service * Rás 1, an Icelandic radio station * Rás 2, an Icelandic radio statio ...

, a title for a regional leader in fascist Italy *

Ras (title) Ras ( compare with Arabic Rais or Hebrew Rosh), is a royal title in the Ethiopian Semitic languages. It is one of the powerful non-imperial titles. Historian Harold G. Marcus equates the Ras title to a duke; others have compared it to "prince". ...

, an Ethiopian aristocratic and court title, as in Ras Tafari * Ras cheese, a variety popular in Egypt * RAS syndrome, "redundant acronym syndrome" syndrome *

Rás Tailteann Rás Tailteann (; "Tailteann Race"), often shortened to the Rás, is an annual international cycling stage race, held in Ireland. Traditionally held in May, the race returned after a hiatus in 2022 as 5 day event held in June. By naming the rac ...