Layman (level 1)

Computer program converted into a more compact format for efficient execution. Not human-readable. Usually lays outside of the scope of responsibilities of a software developer.

Beginner, Expert (levels 2-3)

Program code compiled from source code into low-level code for a software interpreter to execute. May be executed by a virtual machine (e.g. Java Virtual Machine), or may be further compiled into machine code for the processor to execute. Bytecode may allow a single compiled binary to run on a diverse array of platforms.

Example: Python bytecode

1           0 LOAD_NAME                0 (print)
            2 LOAD_CONST               0 ('Hello, World!')
            4 CALL_FUNCTION            1
            6 RETURN_VALUE