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Z39.50 Resources Page

National Information Standards Organization Z39.50 Information Retrieval Protocol (Z39.50/ISO 23950), a computer protocol that can be implemented on any platform, defines a standard way for two computers to communicate for the purpose of information retrieval. A Z39.50 implementation enables one interface to access multiple systems providing the end-user with nearly transparent access to other systems.

Mark Kelly established the original Z39.50 resource page Internet Searching with Z39.50. This resource is built upon his efforts. His work is most appreciated.


General Information on Z39.50

Search with Z39.50

Download Z39.50 Software

Z39.50's International Scope

Z39.50 and Other Standards

Varieties of Z39.50 Implementations

Z39.50 Technology And Services

Further Information on Z39.50 

General Information on Z39.50: 

Search with Z39.50: 

Download Z39.50 Software:

Z39.50's International Scope 

Z39.50 and Other Standards:

Varieties of Z39.50 Implementations and Profiles:


Z39.50 Technology and Services:

Further Information on Z39.50:

Contact Information

Resource page maintained by NISO Headquarters.  Comments and suggestions are welcome.