Factorio Customizable Processing Unit.
Allow to write any logic on low level machine code.
The fCPU acts like a programmable microcontroller with a vector coprocessor that supports many useful instructions.
Seeing as the texture is very low quality, it should probably be updated to the high fidelity versions. The arithmetic combinator which it clearly is a color shift of, looks much nicer, and the fCPU looks very out of place
