1.   Back then, in this rarefied realm, keyboards that link users to the Internet were seen as best left to flunkies.

2.   For the teen-agers, growing up at a time of dwindling resources for arts education, they are a glimpse into the rarefied realms of esthetics.

3.   There is a place awaiting Piazza in that rarefied realm, beginning Saturday.

4.   They have explored the rarefied realms of single-malt scotches and boutique bourbons and are now moving on to tequila as a new frontier.