DJ Delorie is an American software developer. He initiated and maintains the DJGPP project, a port of the GNU C/C++ compiler and tools suite, targeted for PCs running MS-DOS or DOS terminals under Microsoft Windows.
He is also a developer on Harry Eaton's "pcb" (formerly Thomas Nau's "pcb"), an open source layout editor for printed circuit boards. pcb can be a stand-alone application or an element of the gEDA suite.
DJ Delorie makes a point of having his first name actually spelled DJ, and not D.J. or similar. DJ is the actual name, not the initials of first and middle name.