A number of the Mark 2A/2B/2C carriages were declassified in 1985 to become Standard Corridors (coded SK).
Standard Liège | Standard Oil | Standard & Poor's | Advanced Encryption Standard | Standard Chinese | standard | Standard Tibetan | Northeast Corridor | The Weekly Standard | Standard Model | International Standard Book Number | Technical standard | Standard score | Standard Chartered | Standard | Island Eastern Corridor | Gold Standard Laboratories | Evening Standard Award | Capitol Corridor | Standard Motor Company | Manila Standard Today | Java Platform, Standard Edition | gold standard | English Standard Version | C standard library | Wakhan Corridor | Standard German | Standard Fruit Company | Standard English | Standard conditions for temperature and pressure |