- IBM@
- Directory of official IBM web sites. Includes regional and developer resource sites, publications, and divisions.
- Bull (4)
- Stratus Computer, Inc. (3)
- HP Servers & Enterprise Server Systems
- Offers a full range of Hewlett-Packard servers, from entry-level to enterprise, Linux, Windows, UNIX, and more . - Encore Computer Corporation
- Leading supplier of open, scalable computer and storage systems for data centre and mission-critical applications. - Comparex stellt sich vor
- Offers products and services not only in the mainframe market, but also in the world of client/server systems. - Software Diversified Services
- SDS specialises in mainframe systems products. Fujitsu Systems (Europe) Ltd.
- Offers supercomputers for commercial and technical applications, disk and tape storage devices, global servers, and more.- MVS Solutions Inc
- Manufacturers of ThruPut Manager, system software for MVS/JES2. ThruPut Manager provides large mainframe users with intelligent tools to optimise their batch throughput with System Managed Batch. - Reliable Computer Company
- Supplier of S/390 mainframe systems, software and services. - ViON Corporation
- ViON provides IBM 370/390 compatible mainframe computer solutions and professional services to the United States Federal Government. - Mainframe Service Providers, Inc
 - Epoka Group
- Buys and sells used high performance mainframe equipment around the world. - AMI-Allen Myland Inc.
- Buys mainframes and I/O equipment. - Polaris Communications, Inc.
- Designs, develops and markets mainframe channel interfaces and gateways offering high speed connectivity to IBM and plug compatible mainframes. Stratus U.K.
- Provides systems and services where continuous availability is a critical need.- CEVA Computer Corp.
- Unisys computer hardware reseller including Sperry and Burroughs systems, peripherals and parts. - # 1 IBM RS6000 Systems
- Specialises in sales and information on AS/400 and RS/6000 systems. Amdahl Ireland
 - Amdahl Corporation (2)
- Forsythe Technology@
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