SLS Software

SLS Software is a library management system developed by a voluntary group of professional librarians since 1991. It is specially designed for small and medium sized libraries, including school, special, government, church and university libraries. Currently there are more than 500 SLS users located in Hong Kong, Macau, China Mainland and Australia.

SLS Software includes everything you need to get your library running smoothly and effectively. You can install the system either on a standalone computer, on a local area network (LAN) or on your Intranet.

SLS Software supports international standards, including MARC21, ISO2709, Unicode, XML and SOAP. With the internationally adopted MARC standards, including MARC21 and LC's MARCXML Schema, you can easily interchange records among other standard library systems. In addition to the support of bilingual interfaces, SLS Software is Unicode enabled. This means you can store multi-script records (e.g. English, Portuguese, French, Chinese, Japanese, Korean, Cyrillic, etc.) to the catalog and have them correctly displayed in the web browser.

With the module known as SLS XServe, which sits on top of the SLS Library Catalog and listens to database querying and updating requests, SLS users can, for the first time, communicate with the library catalog using their own tools and programming environment, just like you can use SQL to query a relational database. SLSCloud OPAC, slsSIP and remote catalog searching are based on this web services technology.

Functions of the SLS Software

Online Public Access Catalog.Searches the library catalog by a rich set of search methods. View your own circulation records. Book and renew items online. You may also install SLSCloud OPAC to bring your library catalog to the next-generation.

Circulation. Provides a flexible environment for defining local loan rules and other circulation-related parameters. Allows check-out, check-in, renewal, holding items, and fines management. Import patron records from external systems. A rich set of circulation statistics, reports, and notices is available.

Catalog Maintenance. Bibliographic records are displayed and stored in MARC21 format. Users that are not familiar to MARC standards can create and update bibliographic records in the form-based Simple Editor. Import and export records in ISO2709, MARCXML and other formats.

Report Generator. Provides an innovative environment for constructing your own listings, reports and statistics.

Item Inventory. Automates the labour intensive exercise of library stock taking.

Reading to Learn. A web-based module specially designed for Hong Kong Primary and Secondary schools for their Reading To Learn Project initiated by the Hong Kong Education and Manpower Bureau. It provides a platform for students to plan, record and analysis their reading habits and for teachers and parents to monitor and follow up on their reading progress. Reading Habit Analysis (WinREAD) - is a Windows-based module that keeps track of patrons' borrowing history. Provides an innovative interface for students to view their reading habits, submit reading reports and keep track of their reading scores. Teachers and librarians can give comments and assign scores to their students' reading reports and compile various reports and statistics.

System Administration. Through this user-friendly interface, library can setup parameters, codes and passwords used within the SLS Software.

Import Utilities. Use ImportWizard to convert bibliographic, item and patron data that are stored in Excel and plain text file to SLS Import Format. Use SAMS2SLS to convert SAMS student data.

Server Requirement

SLS Server - to host the SLS Core Database and the software

SLSCloud OPAC Server - to host the Next-Generation Library Catalog. You may run SLSCloud OPAC on the SLS Server. Or, you may use a separate Windows or Linux server for SLSCloud OPAC.

Other SLS Products

WebUNION is a web-based client software that allows a library consortium to create a union catalog of their member libraries. Bibliographic and holdings data can be easily uploaded to the union catalog in standard ISO 2709 format. Current users of WebUNION include:

  • Web-based Union Catalog for School Libraries (2000-2011) which is jointly offered by the Hong Kong Education Bureau and the Hong Kong Teacher-Librarians' Association.
  • Union Catalog for Macau Libraries (2006-Present), offered by the Macau Library and Information management Association.
  • EIN - Ecumenical Information Network (1999-2004)
  • DTN - District Teacher Network (2004)

Library consortia who are interested in this software can contact TR Computer Limited for details.

Ordering Information

SLS Software is currently distributed through the Hong Kong Professional Teachers' Union (HKPTU) and TR Computer Limited.

If you are a Hong Kong local secondary school library, you can obtain SLS Software from HKPTU (tel: 2780-7337, fax: 2770-2209).

For other libraries, please contact TR Computer Limited (tel: 2772-1619, email:

For enquiries about SLSCloud OPAC and slsSIP software (which are available free-of-charge to SLS users) and their installation service options, please contact TR Computer Limited.

For general enquiries, please send email to

Technical Support Services

SLS users, whether they obtained the software from HKPTU or TR Computer Limited, or previously from Micrologic Technologies, can enjoy a wide range of technical support services provided by TR Computer Limited. Please contact it for details.