| Cellphones: Not just for calls any more |
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Of the half-billion or so cellphones produced in 2003, fewer than 10 million were so-called "smart phones" with the type of operating system, calendar, e-mail and other software found on computers and handheld organizers.
All the rest of those handsets also run on software, albeit dozens of incompatible operating systems, each chiefly designed to deliver what is still the only "killer application" most users demand of a cellphone — to be a phone.
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