Functional block diagram
![Functional block diagram of the attitude control and maneuvering electronics system of the Gemini spacecraft. June 1962.](/Images/godic/202501/14/Functional_block_diagram_of_the_attitude_control_and_maneuvering_electronics_system4357.jpg")
A functional block diagram in systems engineering and software engineering is a block diagram. It describes the functions and interrelationships of a system.
of a system pictured by blocks
The block diagram can use additional schematic symbols to show particular properties.