Data refers to raw, unprocessed facts, figures, symbols, observations, or records that by themselves may not convey a clear meaning. Examples include names, numbers, dates, transaction records, survey responses, and statistical observations. Data can be quantitative or qualitative and may exist in textual, numerical, audio, visual, or digital forms. In the context of libraries, data may include bibliographic details, user records, circulation statistics, catalogue records, and usage information. Information is processed, organised, and interpreted data that has meaning and relevance for a particular purpose. When data is arranged in a meaningful form, it becomes information. For example, a list of books containing their authors, titles, subjects, publishers, and publication dates is information because these elements help users identify and select appropriate resources. Information reduces uncertainty and supports decision-making. Libraries are major institutions for collecting, organising, preserving, retrieving, and disseminating information. Knowledge is a higher level of understanding that develops when information is interpreted, connected with experience, and applied to a particular situation. Knowledge involves understanding relationships, principles, concepts, and methods. For example, a student may obtain information about climate change from books and databases, but understanding its causes, consequences, and