#Binary_code_compatibility is when systems can run the same #executable, typically #machine_code for a general-purpose computer.

#Source_code_compatibility on the other hand, is when recompilation or interpretation is necessary.

#executable code causes a computer to perform indicated tasks according to encoded instructions as opposed to a data file that must be parsed by a program to be meaningful.

In some contexts a file containing bytecode or scripting language instructions may also be considered executable.

#machine_code means either the assembly code or its binary sequence translation.