Mainframe

Tom Van Vleck's history of the IBM System/360 Model 67 computer and the CP/CMS operating system, which later became z/VM.

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

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

Provides product specific expertise on z/OS, DB2, CICS, IMS and WebSphere, as well as customized software development for mission-critical applications.

Public and on-site training for mainframe application developers, systems programmers and operators. From Assembler to z/OS. Encompasses Circle Education, Amdahl Education, Laird Ståhl Training and RSM Education.

Self-study, including many mainframe, courses offered on CD-ROM, or as 3 and 12 month Web-based training subscriptions. Formerly FirstClass Systems.

IBM Advanced Business Partner that provides all-inclusive mainframe-based solutions, including hardware, software, planning, customization, training and support.

Mainframe software asset management (SAM) and software asset optimization for both IBM and non-IBM software.