The Fifth International Conference on Ion Implantation took place in Boulder, Colorado between the 9th and 13th of August 1976. Papers were delivered by scientists and engineers from 15 countries, and the attendees represented 19 countries. As has become the custom at these conferences, the sessions were intense with the coffee breaks and evenings given to informal meetings among the participants. It was a time to renew old friendships, begin new ones, exchange ideas, personally question authors of papers that appeared in the literature since the last conference and find out what was...