Pulleys serve as essential components of various industrial, commercial, and residential applications, including elevators, cranes, and even window blinds. They are mechanical devices that transfer force from one point to another, typically by the use of a rope or cable under tension. Synonyms for pulleys include wheels, sheaves, blocks, and rollers. These terms represent similar mechanical components that serve the same purpose as pulleys, but with different specific applications. For example, a block and tackle system combines several pulleys, utilized in heavy lifting applications. Similarly, a roller system is an efficient means of transferring power while reducing friction and wear.