Seeing as I’m a bit of a BlackBerry addict and an ex moderator at BlackBerryItalia many a time I’ve had to write the plural form of BlackBerry. The BlackBerry is a wireless handheld device introduced in 1999 as a two-way pager. In 2002, the more commonly known smartphone BlackBerry was released, which supports push e-mail, mobile telephone, text messaging, internet faxing, web browsing and other wireless information services. It is an example of a convergent device. Developed by the Canadian company Research In Motion (RIM), it delivers information over the wireless data networks of mobile phone service companies. BlackBerry first made headway in the marketplace by concentrating on e-mail.
Whilst Twittering the other day I followed the link given by GrammarGirl of the theory as to which one we should use. Although we typically make words that end in “y” plural by replacing the “y” with “ies,” the same rule does not hold true for family names. For example, it is generally agreed that the plural of “Kennedy” is “Kennedys.”
If your gadgets were more like fruit, then we would call two of them “BlackBerries.” But I believe a brand name is more like a family name, and therefore, the proper plural is “BlackBerrys.” A search of the BlackBerry website also shows that the company agrees and uses the plural “BlackBerrys.”
So there you go, I learnt something too