An OPAC replaces traditional card catalogues with a computerised interface that users can query by author, title, subject or keywords. It allows faster and more flexible searching for items in the collection. In some systems, the OPAC can be accessed remotely as well. Therefore, its primary function is to support searching the library’s holdings.
Option A:
Automated issue and return of books may be handled by circulation modules or self-check machines, which are separate though related systems. OPAC itself focuses on discovery, not on every circulation function.
Option B:
Playing online games is not an intended academic use of library computers and has nothing to do with catalogue searching. This behaviour does not represent the purpose of an OPAC.
Option C:
This option correctly identifies search as the core service offered by OPAC. It reflects modern practice in ICT-based library management where users locate items via terminals or web interfaces.
Option D:
Changing curricula is an academic governance task and cannot be done simply by interacting with the library catalogue.
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