I learned on the AS/400 and RPG. I still kind of prefer it to SQL for reading/writing from database. I also really liked CL as a scripting language and the obje

I learned on the AS/400 and RPG. I still kind of prefer it to SQL for reading/writing from database. I also really liked CL as a scripting language and the object-orientation of the operating system. In the early 2000's I was involved in porting Subversion to OS/400. I had to build a replacement for make and the build tools but it almost all compiled on the first try. Then spent the next year dealing with EBCDIC issues. By the time we were done, IBM had updated the C compiler so we could make it UTF8-native and that let us remove our entire patch. There was/is a lot of cool stuff about the AS/400