As Mark uses the expression “seismic qualification”, he is referring to a process of systematically identifying vulnerabilities of operating systems to a credible earthquake hazard, and then bringing the risks to acceptable levels through design, construction, and maintenance or configuration control. “Seismic qualification” is more often thought of and applied on an individual component basis, but it’s more significant value lies in the overall consideration of the many inter-dependent components that make up most important operating systems.