Aer Lingus Group Plc (ISEQ: EIL1, LSE: AERL) (an anglicisation of the Irish Aer Loingeas meaning "air shipping") is the flag carrier of Ireland. It operates a fleet of Airbus aircraft serving Europe, North America and North Africa. It is Ireland's oldest extant airline, and its second largest after low-cost rival Ryanair. The airline's head office is located on the grounds of Dublin Airport.

Formed in 1936, Aer Lingus is a former member of the Oneworld airline alliance, which it left on 31 March 2007. While it is not part of an alliance, the airline has codeshares with Oneworld, Star Alliance and SkyTeam members, as well as interline agreements with Aer Arann, JetBlue Airways and United Airlines. The company employs 4,000 people and in 2011 had revenues of €1.3 billion. Aer Lingus flew 9.5 million passengers in 2011. It has a hybrid business model, operating a mixed fare service on its European and North African routes and full service, two-class flights on transatlantic routes.

Aer Lingus is 29.4% owned by its rival, Ryanair, and 25.4% owned by the Government of Ireland. The airline was floated on the Dublin and London Stock Exchanges on 2 October 2006, following prior government approval (the government previously owned 85% of the airline). The principal group companies include Aer Lingus Limited, Aer Lingus Beachey Limited, Aer Lingus (Ireland) Limited and Dirnan Insurance Company Limited, all of which are wholly owned.

Aer (アエル, aeru^?) is a skyscraper in Sendai, Miyagi Prefecture, Japan. Rising 31 stories to a height of 145.5 m, Aer is the tallest building in the Tohoku region and was partially constructed by robots.

Aer is a mixed used complex built as a part of the redevelopment of the west side of Sendai Station. Floors 1 to 4 are occupied by retail businesses, including chains such as Uniqlo and Maruzen. Floors 5, 6, and 7 are occupied by municipal government offices, while floors 8 through 30 are occupied by commercial offices. Located on the 31st floor are a free observation deck, and Heichinro, an expensive Chinese restaurant chain. A unique feature of this building is that is was partially constructed by robots.^{[citation needed]} The top floor was assembled with a lattice of overhead rails. It was jacked up and the first floor was then constructed. This process was repeated until the building stood at its full height. Robots welded, located columns and beams, pored and leveled concrete. The postal codes 980-61xx are reserved for this building, with xx indicating the floor of the building. Postal codes of 32 and higher are available to specific clients.