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Computer Savings Corporation
Buys and sells hardware, including IBM mainframe systems and components.

Cornerstone Systems, Inc
An IBM partner/reseller and Lotus Notes business partner offering a variety of products and services for eserver zSeries running z/OS, z/VM and VSE/ESA operating systems.

Simon Systems
Specializes in IBM S/390 mainframe solutions, Multiprise 3000 and Numa-Q hardware, software and maintenance packages.

T3 Technologies
Offers mainframe systems: both the zSeries and Intel-based FLEX/ES mainframe emulation. And disaster recovery and systems programming services.

Data Dallas Corp.: DDC
Internet access to a mainframe; z/OS time-sharing, including TSO, CICS, DB2, SAS, via Internet: tn3270 and ftp. Also, media conversion, laser printing, and mailing and direct marketing services.

ITC
Information Technology Company is an IBM Advanced Business Partner that provides all-inclusive mainframe-based solutions, including hardware, software, planning, customization, training and support.

Technical Enterprises
TEI publishes technical periodicals, hosts conferences and provides Internet services and general management for professional organizations. It began with the mainly mainframe NaSPA organization.

Xephon
A technical and market research organization focused on the computing needs of organizations with IBM mainframes. Provides technical journals and reports for both management and support staff.

Monitor
z/OS classroom courses and Datatrain mainframe computer-based training, mostly in English, in the Netherlands and Belgium.

Alicomp
Mainframe (z/OS, z/VM, VSE/ESA and zLinux) and open systems data center outsourcing services, including disaster recovery and business continuity with an emphasis on hospital and insurance organizations. An Amalgamated Life company.