Turbo Pascal 3.0 was my first serious programming language (after Apple ][ Basic). 30kb of editor/compiler in one package. Then used Turbo/Borland Pascal 5.0/5

Turbo Pascal 3.0 was my first serious programming language (after Apple ][ Basic). 30kb of editor/compiler in one package. Then used Turbo/Borland Pascal 5.0/5.5 for quite a while, a bit of 6.01, short Delphi, and by that time already moved to C/C++ I moved of a reasonably stupid thing. The MoveFile() function exposed in Borland Pascal was not able to move files between folders. Although I knew some assembly, and Ralph Brown Interrupt List was the greatest thing ever, I did not consider rewriting routines in it (For some reason I was thinking - this language supports this, and this one that... much later I realized - these were just libraries, even if they were builtin ones - CRT). But for that reason I moved to C/C++ - because it had the function... lol. I loved how .TPU/.DPU files worked, much more efficient than headers.