What do you understand by an alerting service? Critically examine the characteristics of a computerized CAS and SDI services.

An alerting service, in the context of library automation, is a valuable tool that helps users stay updated with relevant information, research, or resources in their areas of interest. It is designed to notify users about new content or materials that match their specific preferences, allowing them to stay informed without having to actively search for information. Alerting services are crucial in the digital age, where the volume of information is vast and continuously growing. In the realm of library automation, alerting services have evolved significantly, with Computerized Current Awareness Service (CAS) and Selective Dissemination of Information (SDI) services being two prominent examples.

Characteristics of Computerized CAS:

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