Bicycling (commuting and occasional
day trips)
Camping (wilderness)
Canoeing (preferably quietwater rivers)
Computers (of
course)
Dancing (ballroom,
polka,
cajun, contra,
square,
folk,
...)
Flying (since
1971, private, single-engine, instrument)
Ham radio (since
1955,
amateur extra,
W9AV,
formerly K4BOM)
Rafting (small streams in southern
Wisconsin)
Skiing (downhill and cross-country)
Spelunking (crawling around in caves,
mostly in east Tennessee)
Tennis (contingent on a suitable
partner)
Writing (books and
technical papers)
"...the man's a human dynamo" -- DoIT Now, March, 1996
Read a profile in Wisconsin
Week from August, 2005.