alcor

ALCOR is an early computer language definition created by the ALCOR Group, a consortium of universities, research institutions and manufacturers in Europe and the USA which was founded in 1959 and which had 60 members in 1966. The group had the aim of a common compiler specification for a subset of ALGOL 60 after the ALGOL meeting in Copenhagen in 1958.

1. Alcor is often used as a test for the naked eye's ability to discern faint stars.
   北斗七星中的第五等星常被用作测试裸眼分辨微弱星星的能力。
2. In ancient times, sailors used Alcor and Mizar for navigation.
   在古代，水手们利用北斗七星中的第五等星进行导航。