Once one gets past the hype of the 'Open Source' revolution, there is much good development and documentation work occurring. We support the other more marginal market share distributions as well. The HP-UX market is vibrant and firmly embedded in the datacenter. Owl River Company is an 'Caldera Authorized Partner'. This is their highest level in their Partner Program.
Caldera has good market penetration in vertical market applications.
We don't get much call for it anymore, with the rise of the various Open Source operating systems, but Owl River Company is an 'SCO Authorized Reseller'. Vertical market software. We have a link to that page. Because, ultimately, standard is better than better. Open is more approchable than closed.