What is "opa"

Opa may refer to:

• Opa! (Greek expression), a Greek expression

"OPA!" is a song by Greek singer Giorgos Alkaios. It represented Greece in the Eurovision Song Contest 2010. The song was released by broadcaster Hellenic Broadcasting Corporation (ERT) on 26 February 2010 along with the other candidate songs from the national final, while a digital download was released on 12 March 2010 in association with Universal Music Greece.

Opa was an indoor steel and Wild Mouse roller coaster located at Mt. Olympus Water & Theme Park in Wisconsin Dells, Wisconsin. The ride closed indefinitely on March 6, 2014, after a man fell off the ride. On April 1, 2014, Mount Olympus released a statement saying that they have permanently closed the ride.

Opa were an American jazz fusion band made up of Uruguayan members. They started in the 1970s, and released two albums in the US: Goldenwings ( Milestone Records M-9069, 1976) and Magic Time ( Milestone Records M-9078, 1977). Both were produced by Brazilian musician and composer Airto Moreira.

The band consisted of Hugo Fattoruso, George Fattoruso and Hugo "Ringo" Thielmann, plus guest artists Hermeto Pascoal, David Amaro, Barry Finnerty, Flora Purim, Ruben Rada, Gary Gazaway, Jose Pedro Beledo, etc. Opa had played on previous albums by Airto Moreira, like Fingers ( CTI Records CTL 18), released in 1973, and Deodato/Airto in concert ( CTI Records CTI 6041), released in 1974.

Opa is an open source programming language for developing scalable web applications.

It can be used for both client-side and server-side scripting, where complete programs are written in Opa and subsequently compiled to Nodejs on the server and JavaScript on the client, with the compiler automating all communication between the two. Opa implements strong, static typing, which can be helpful in protecting against security issues such as SQL injections and cross-site scripting attacks.

The language was first officially presented at the OWASP conference in 2010, and the source code was released on GitHub in June 2011, under a GNU Affero General Public License. Later, the license changed to the MIT license for the framework part (library) and AGPL for the compiler so that applications written in Opa can be released under any license, proprietary or open source.

OPA! is a Malmö-based Swedish 6-member musical band with Swedish and folk / pop / ethnic influences featuring Greek-Swedish singer Michael Sideridis (lead vocals). Other members are Thor Ahlgren, Martin Eriksson, Johan Ohlsson, Andreas Rudenå and Emil Sjunnesson.

The band took part in Sweden's Melodifestivalen 2012 in day 4 of semi-finals held at Malmö Arena on 25 February 2012 with the song "Allting blir bra igen" (meaning Everything will be fine again) with music and lyrics by Michael Sideridis. They are signed with Roasting House label and distribution by Universal Music.

Following Melodifestivalen, the band released their debut album Tills du kan sjunga med that entered the Swedish Albums Chart at #26 in May 2012.