Kappa Computer Solutions, LLC
- Software and consulting solutions for UNIX-based systems (including Free BSD, Linux, and SunOS/Solaris) since 1974.
- http://www.kappacs.com/

Intelligent Systems Services Inc.
- Specializing in multivendor UNIX and Oracle consulting, clustering and high availability solutions.
- http://www.iss-integration.com/

Digitask Consultants, Inc.
- System availability specialists for mission critical computer systems in OpenVMS, Unix and NT environments on 32/64-bit LAN/WAN connected, Compaq (DEC) and Sun platforms.
- http://www.digitask.com

Expert Systems Consulting
- Consultancy for trade service array software and the electrical wholesale industry. Also provides web design services.
- http://www.esc-online.com

LCR: Leonine Computational Resources
- A Unix Systems Consulting organization serving the northern regions of Minnesota and Wisconsin. We provide high quality service at reasonable rates for all your Unix systems needs.
- http://www.leonine.com/

OPUS Systems
- Opus Systems is the market leader in providing Unix-based systems for the embedded PC market. Its flagship product is the Turbo SPARCard 5 system for PCs, which provides a complete Sun Microsystems SPARCstation-compatible system in a PC form factor. Cuper
- http://www.opus.com/

A.P. Lawrence SCO Unix Consultant
- Provides support and services for SCO Unix.
- http://www.aplawrence.com

DSL Consultants
- Chicago's UNIX consulting professionals.
- http://www.dslc.com