you can use the "fast skin" suits for both swimming and athletics track events
you can use the advancement in drug testing procedures
you can use the touch pads used at the end of swimming pools
you can use electronic timing for any sport for that matter
you can use the equipment technology, like for athletics now they are starting to put special measuring devices inside the shotputs, discus, hammer throw, javelin, etc, so that as the competitor throws the object, it is electronically measured against a device like an electronical measuring tape that sits along side the throwing area, so that people in white coats do not have to run out into the path of a flying object any more.
you could use the new stadium technology that allows them to close the roof... i.e. rod laver arena for the tennis..
there are heaps of examples, but you won't find them in any textbooks, you'll have to go looking in the media and especially archives of the newspaper and sports magazines...
hope that helps...