Correction now that I'm not on my phone: A+ was GPLed in jan 2001, making this 19 years ago - and indeed, the last change was in 2008 for 64-bit support, but at

Correction now that I'm not on my phone: A+ was GPLed in jan 2001, making this 19 years ago - and indeed, the last change was in 2008 for 64-bit support, but at that point that project had been already quite stagnant for 5-6 years -- changes and releases were all concerned with documentation and newer build environments. The "electric" GUI concept (The "+" in "A+" - without the GUI it was just called "A") was much simplified in k2 - it was fast, simple and extremely effective even though it didn't really look good - it is, in fact, the only environment I've ever had a chance to use where having a GUI is as simple or simpler than writing a batch program -- see e.g. 15-Puzzle[0] or the spring simulation[1] (even though the canonical example is the S- spreadsheet which you can find at the same site). [0] http://nsl.com/papers/puzzle15.htm http://nsl.com/papers/puzzle15.htm [1] http://nsl.com/papers/spring.htm http://nsl.com/papers/spring.htm