In this age of the email attachment and of the “duplicate” and “save as” commands, we’ve come to take copies for granted.  But the quest for a way easily to make/keep duplicates of correspondence and records without transcribing them has a long history: most readers will be old enough to remember the days when Xerox machines– introduced in 1959**– were the duplicators of choice; and some, the era of the carbon copy.   407 more words