Compatibility among Information Storage and Retrieval (ISAR) systems is essential because information is increasingly created, stored, processed, and retrieved through different systems, databases, software platforms, and network environments. An organization may use multiple information systems for libraries, archives, research, administration, business, or education. If these systems are incompatible, information cannot be exchanged, searched, or used efficiently. Compatibility ensures that information stored in one system can be understood, transferred, and retrieved by another system without unnecessary conversion or loss of meaning. The major need for compatibility arises from the growth of information resources in different formats and systems. Users often require access to information distributed across several databases and retrieval services. A compatible environment allows a single search interface or retrieval mechanism to access multiple information sources. This reduces duplication of effort, saves time, and improves the quality of information services. Compatibility also facilitates resource sharing among libraries and information centres, enabling users