A "tool" is any device or implement used to carry out a specific function or task. Tools can be simple, like a hammer or screwdriver, or complex, like a computer or robot. They help people perform work more efficiently and effectively, making tasks easier to accomplish. Tools can be categorized into various types, including hand tools, power tools, and specialized tools. Hand tools are operated manually, while power tools use electricity or batteries to function. Specialized tools are designed for particular tasks, such as surgical instruments used in medicine or gardening tools for landscaping.