Worldwide Apple Developers Conference 1989

Worldwide Apple Developers Conference 1989 (or Dev Con '89) was a computer conference that was hosted by Apple Computer for its developers at the San Jose Convention Center in San Jose, California. It was Apple's 5th annual Developers Conference, held from May 9 to 12, 1989.

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System 7 was the main product introduced at Dev Con '89, though it did not yet support pre-emptive multitasking, which was planned as part of a future project which was rumored to be System 8. Apple and DEC had scheduled a joint seminar about Communications Toolkit.