1. In href="module.php?name=Lexikon&file=search&eid=1&query=Ada">Ada, the method of synchronising the activity of different tasks. 2. Query language, close to natural English. ["Seven Steps to Rendezvous with the Casual User", E. Codd in Data Base Management, J.W. Klimbie et al eds, N-H 1974, pp.179-199].