OPERATING SYSTEMS With expertise in a broad range of operating systems, Thesaurus has the skills to plan, install, configure, upgrade and tune systems for clients. We also have extensive experience of migrating to new operating systems. We bring both the technical knowledge of individual operating systems and the management skills to oversee their implementation and ongoing operations. Systems where we have expertise include: AIX, CMS, DOS, HP-UX, Linux, Novell, OS/2, OS/390, OS/400, PR/SM, SCO Unixware, Solaris, Sysplex, Ultrix, Unix, VM/ESA, Windows XP/NT/2000/9x/3.1, z/OS, z/VM.