UmbrelOS refers to an open-source operating system designed specifically for running a personal Bitcoin and Lightning Network node. u003cbru003eu003cbru003eUmbrelOS aims to simplify the process of setting up and running your own Bitcoin and Lightning Network node, allowing individuals to participate in the network's validation and transaction processing while also contributing to its decentralization. u003cbru003eu003cbru003eBy using umbrelOS, users can have more control over their financial transactions and support the overall health of the Bitcoin network.