ALEF <language> A programming language from {Bell Labs}. ALEF boasts few new ideas but is instead a careful synthesis of ideas from other languages. The result is a practical general purpose programming language which was once displacing {C} as their main implementation language. Both {shared variables} and {message passing} are supported through language constructs. A {window system}, {user interface}, {operating system} network code, {news reader}, {mailer} and variety of other tools in {Plan 9} are now implemented using ALEF. (1997-02-13)