UA HPC systems are funded through the UA Research Office (ORD http://research.arizona.edu/) and CIO/UITS (Chief Information Officer, and University Information Technology Services)
All UA HPC systems are available to all UA researchers (Faculty, staff, undergrad and grad students, postdocs, etc) at no cost. Presently each research group is provided with the standard allocation of 36,000 cpu-hours per month on Ocelote and 7,000 cpu-hours per month on El Gato.
The HPC systems are a shared Linux environment with most of the applications, compilers and programs needed to support your research. Staff is funded to administer the systems and provide consulting services (no charge) for all researchers.