I've used Rexx a lot on IBM mainframes. 370 series VM/CMS. It took over from EXEC/2 as the "system interpreter" and a lot of system utilities were written in

I've used Rexx a lot on IBM mainframes. 370 series VM/CMS. It took over from EXEC/2 as the "system interpreter" and a lot of system utilities were written in it. The email app was written in Rexx. You could write add-ons/macros to XEDIT in Rexx. The integration with everything was just awesome. Even wrote a couple of games that ran on graphics terminals (3279???) ... my version of pacman and space invaders... There was even this whole image processing library built over it... Very powerful language though also very well matched to the environment and didn't carry as cleanly to others though it was nice to have it in OS/2. Clearly ahead of its time back in the day when IBM actually did cool stuff ;). https://en.wikipedia.org/wiki/Mike_Cowlishaw https://en.wikipedia.org/wiki/Mike_Cowlishaw