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.
Mods introducing new content into the game.
Related to roboports and logistic robots.
Entities which interact with the circuit network.
Could you add a new GUI button to swap green/red variables, but keep everything other unchanged: red => green, green@1 => red@1, and etc.
It is good if we use a cable swap for blueprints.