OOPSLA is the annual conference for Object-Oriented Programming Systems, Languages and Applications, sponsored by the SIGPLAN and SIGSOFT groups of the Association for Computing Machinery (ACM). The first OOPSLA conference was held in Portland, Oregon in 1986.
OOPSLA organizers describe the conference as the "premier forum for object technology" (object-oriented programming). The conferences, which feature formal presentations, tutorials, workshops, and demonstrations, are attended by leading industry researchers and regular users alike. At any given OOPSLA conference, 45-55% of attendees are developers, 15-25% are academics, and 15-25% are managers, with amateur software enthusiasts making up the balance. OOPSLA 2001, held in Tampa, Florida, attracted about 1,350 people from 35 different countries.