What is "ps-algol"

PS-algol is an orthogonally persistent programming language.

PS-algol was an extension of the language S-algol implemented by the Universities of St Andrews and Edinburgh, Scotland. S-algol was designed by Ron Morrison, and extended and by Pete Bailey, Fred Brown, Paul Cockshott, Ken Chisholm and Al Dearle.

PS-algol was the world's first fully implemented persistent programming language, and had a significant quantity of users both in academia and, notably, in ICL research labs.