On the occasion of the 30th anniversary of the founding of the American Vacuum Society, we have prepared a history of the past decade which is intended to update a history of the first 20 years of the Society published in 1973. Included is information on growth in all areas and changes in administration and operations intended to poise the Society to better serve the technical community. Also recounted are data related to membership, symposia, publications, education, awards, scholarships, international activities, and interactions with various elements of the U.S. Government.