I. OPAC

OPAC is the abbreviation of English Online Public Access Catalogue, and it is an online public retrieval catalogue. This is an online catalog retrieval system for library readers to inquire about their books. It has changed the situation of using card catalogue to retrieve the collected documents manually in the past, and it is an important tool for modern libraries to retrieve information resources through computer networks. Specific functions include the following aspects:

1. Book catalog information query: search all books in the library.

2. Readers' borrowing information query: retrieve information such as readers' personal borrowing and overdue debts, and renew them?

3. online book ordering consultation: readers can make reference suggestions for the library to purchase literature and replenish its collection?

4. Online information release: overdue debt announcement and book reminder?

5. new book notice: inform readers of the documents that have come to the library in the last two months?

Second, WebPAC.

WebPAC originated from OPAC and is a retrieval tool for readers to find collections. OPAC is a computerized library card catalogue, and network PAC is an upgraded version of OPAC interface network. The query subsystem directly faces the readers and is the window of the whole library automation management system. The specific functions are as follows:

1. Book catalog information query: used to query the bibliographic information, collection and circulation of all books and periodicals in the collection. Users can define multiple query channels and query contents, and further limit the query results from the aspects of literature type and language type.

2. Circulation information query: query the bibliography, borrowing date and expiration date of all books borrowed by readers. For readers who violate the rules, the system will also display their violation records.

3. Online booking: displays the valid booking records and status submitted by readers, and allows readers to delete or add booking records.

4. Renew the loan online: Readers can renew the loan online, which is convenient for readers and can also reduce the workload of circulation staff.

5. Reader's personal information modification: Readers can modify personal information such as personal password and email address here.

6. New Book Notification: Displays a list of newly arrived books. Readers can specify the time range and literature type.

7. Book browsing: You can browse the book information of various books online.

8. Information release: display book reservation, book reminder and notice of overdue payment. All these notifications are automatically generated by the system.