In its first decade, the HEASARC has become so integral to high energy astrophysics research that it is hard to
find a paper in this field that has not benefited in some way from the existence of the HEASARC. This may be by using
HEASARC infrastructure to develop a proposal for an operating mission, using the HEASARC database to acquire archival
data, or using the HEASARC software for scientific data analysis. We provide here a few results which make particular
use of the HEASARC archive. These are usually projects involving large samples from one or more missions. These
results are as illustrations of the powerful resources that the HEASARC makes available to the world-wide astronomical
community.
