COWSEL

COWSEL ("COntrolled Working SpacE Language") is a programming language designed between 1964 and 1966 by Robin Popplestone. It was based on a RPN form of Lisp combined with some ideas from CPL.

COWSEL was initially implemented on a Ferranti Pegasus computer at the University of Leeds and on a Stantec Zebra at the Bradford Institute of Technology; later, Rod Burstall implemented it on an Elliot 4120 at the University of Edinburgh.

COWSEL was renamed POP-1 during the summer of 1966 and development continued under that name from then on.

Example code

function member lambda x y comment Is x a member of list y; define y atom then *0 end y hd x equal then *1 end y tl -> y repeat up

ee also

* POP-2 programming language
* POP-11 programming language
* Poplog programming environment

References

* Technical report: EPU-R-12, U Edinburgh (Apr 1966)

External links

* [http://www-robotics.cs.umass.edu/Popplestone/pop_development.html The Early Development of POP]