md&di md&di md&di is a trade magazine for the medical device and diagnostic industry published by ubm canon (los angeles). it includes peer-reviewed articles on specific technology issues and overviews of key business, industry, and regulatory topics. it was established in 1979. in 2009 it had a monthly print circulation of 48,040 but is now an online publication with a claimed circulation of 89,000. ubm canon and the magazine has also sponsored the medical design and manufacturing (md&d) west conference & exposition (formerly the md&di west conference & expo), a medical device trade show, since 1978. the magazine sponsored the medical design excellence awards and produces a list of 100 notable people in the medical device industry. the term "use error" was first used in may 1995 in an md&di guest editorial, the issue is 'use,' not 'user,' error, by william hyman.