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.