[Solved] Real knowledge is stored only in structured documents. Categories: Involves classification or grouping of items, concepts, or entities based on shared characteristics or attributes. Hazardous Materials: Substances that are capable of posing significant risks to health, safety, property, or the environment when improperly handled, stored, or transported. Organization's Premises: The physical location or buildings where an organization operates or conducts its business. Search Engines: Web-based tools that allow users to find information on the internet by typing keywords or phrases into a search query.