title: Was ALGOL ever used for "mainstream" programming?
body: <p>I know that <a href="http://en.wikipedia.org/wiki/ALGOL" rel="noreferrer">ALGOL</a> language is super-uber-extremely important as a theoretical language, and it also had a variety of implementations as per Wikipedia. </p>
  
  <p>However, what's unclear is, was ALGOL (pure ALGOL, not any of its derivatives like Simula) ever actually used for any "real" programming in any way? </p>
  
  <p>By "real", I mean used for several good-sized projects other than programming language/CS research, or by a significant number of developers (say, > 1000).</p>
  
  <p>Personally, the only ALGOL programming I have ever done was on paper, thus the curiosity.</p>