- A.P. Lawrence SCO Unix Consultant - Provides support and services for SCO Unix.
- 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.
- DSL Consultants - Chicago's UNIX consulting professionals.
- Expert Systems Consulting - Consultancy for trade service array software and the electrical wholesale industry. Also provides web design services.
- Intelligent Systems Services Inc. - Specializing in multivendor UNIX and Oracle consulting, clustering and high availability solutions.
- Kappa Computer Solutions, LLC - Software and consulting solutions for UNIX-based systems (including Free BSD, Linux, and SunOS/Solaris) since 1974.
- 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.
- 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. Cupertino, CA.
- Unexia Ltd - Unexia ltd offers unix/network support, setup and design services
