> Executable code is what results when a software compiler turns source code—in the case of the AXE, programs written in the PLEX language—into the binary machi

> Executable code is what results when a software compiler turns source code—in the case of the AXE, programs written in the PLEX language—into the binary machine code that a computer processor executes. That was my first thought as well, but it looks like they used a language called "PLEX" that is specifically built for the AXE switches.