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About Us

CSI International is an Independent Software Vendor (ISV) providing software and consulting solutions to customers who use IBM’s z/OS and z/VSE operating systems and related products.



CSI’s software solutions are available worldwide through its international distribution network, and directly in North America from CSI and select business partners. The corporate headquarters are located in Williamsport, Ohio, with additional facilities for Research and Development, Sales, and Technical Support in many locations in the United States and Europe.


Our History

In 1995, Connectivity Systems, Inc. was founded to provide a native TCP/IP solution for the enterprises using the VSE environment. Appropriately named TCP/IP for VSE. It quickly became the de facto standard for the platform.


In 2002, Connectivity Systems acquired B I Moyle Associates, Inc., from the heirs of Ben Moyle. The acquisition of software and engineering talent enabled Connectivity Systems to expand its reach far beyond networking and VSE. The merged company provides z/OS and z/VSE solutions addressing systems management, data management, production control, automation, and security.


Connectivity Systems, Inc., and B I Moyle Associates, Inc., are now fully integrated as CSI International.



CSI International continues to further develop, market, support and introduce new industry-leading solutions that enhance and extend the mainframe experience while reducing the overall cost of IT. The mission of CSI International is “Help Customers Succeed.” Putting our customers first is the driving force behind everything we do.


Latest News

z/Insider

15 Feb, 2024
CSI releases TCP/IP for VSE 2.3.3
What's new in DataMiner-Dash 8.5.1 icon image
02 Dec, 2023
DataMiner-Dash for z/OS 8.5.1 Enhancements
Data Sheet icon image for TCP/IP for VSE 2.3.2
26 Apr, 2023
CSI releases TCP/IP for VSE 2.3.2
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