A sector, or division, refers to a distinct part of a larger system or organization, often categorized by specific functions or characteristics. In economics, sectors are commonly divided into primary (extraction of raw materials), secondary (manufacturing), and tertiary (services) sectors. Each sector plays a vital role in the overall economy and contributes to its growth and stability. In business, a sector can also refer to a specific market segment, such as the technology sector or the healthcare sector. Companies within a sector often share similar goals, challenges, and regulatory environments, allowing for targeted strategies and collaboration among businesses.