* Electricity: He developed several electrical systems, including a system for transmitting power wirelessly, and a "third rail" system for electric railways.
* Transportation: He invented a number of devices for improving railway safety, including a "steam boiler furnace" and an automatic safety switch for electric railways.
* Communication: He is best known for his "telegraphony" system, which allowed telegraph operators to communicate using their own voices.
Woods' inventions were groundbreaking and innovative, and he was awarded numerous patents for his work. While he didn't have a formal scientific background, his ingenuity and practical skills led him to make significant contributions to several fields.
