What is the name of a computer program, which always has complete control over everything in the system? The program is responsible for preventing conflicts between various processes and mitigating any such conflicts. The program is always resident in memory, facilitating interactions between hardware and software. The term stems from old English, meaning "seed" and from which the word "corn" also derives.

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Answer to yesterday's question: "FR-4", where letters FR stand for "Flame Retardant", denoting a grade designation for glass-reinforced epoxy laminate. According to Wikipedia, the composite material comprises woven fiberglass with epoxy resin, and typically employs halogens to facilitate the flame-resistant properties (https://en.wikipedia.org/wiki/FR-4). Due to its mechanical strength FR-4 is commonly used as an electrical insulator. For PCBs, thin layers of copper foil are laminated on one or both sides of the panel.