Hikosaburo Yasuda says he knows a trend when he sees one and plans to buy Apple Inc.’s iPad to keep up with junior members in his computer club. Yasuda is 95.

“It’s important to always try new things, otherwise you get left behind,” Yasuda said. “All these books in just one place, and so many familiar, classic titles that I’ve never had a chance to read. I want to buy the iPad just for that.”

Any concerns regarding a cannibalistic impact of the iPad on Mac sales, were recently laid to rest by Apple’s Q3 2010 earnings call; the iPhone and the iPad, which run on iOS, led an impressive, best-ever, everything-but-the-iPod, sales quarter. For a closer look at who is buying two of Apple’s most popular devices, we turn to The Nielsen Company’s survey of more than 64,000 mobile subscribers, fielded April through June 2010.