During the past 40 years, the cellphone has evolved.
It has gone from a bulky, heavy luxury item used by a very select few solely to place phone calls to a sleek, ultralight computer used for everything from taking pictures to monitoring health.
Here's a look at how mobile devices have evolved over the past four decades and at the companies who built the items that manage our lives.
1973: Dynamic Adaptive Total Area Coverage
A trailblazer in early-cellphone technology, Motorola debuted a prototype of the Dynamic Adaptive Total Area Coverage (DynaTAC) portable phone in 1973. It layed the groundwork for what we know as the modern smartphone.
Martin Cooper, at the time a vice president at Motorola, made the first handheld mobile phone call using the device.
1983: Motorola DynaTAC 8000X
Perhaps most famous for its use by corporate raider Gordon Gekko in the 1987 film Wall Street, the Motorola DynaTAC 8000X weighed just under 2 pounds and cost an equivalently hefty $4,000.
The phone worked on North America's first 1G service—a harbinger of the 4G that is de rigueur with smartphone consumers now.
1993: Bell South IBM Simon Personal Communicator
While the term had yet to be coined, the IBM Simon—a mobile phone, pager, fax machine and PDA in one—is perhaps the world's first "smartphone."
The device, which sold for $899, featured a calendar, address book, calculator and touchscreen capability, a standard hallmark of today's smartphones.
1996: Motorola StarTAC
The first "clamshell," or flip, mobile phone, the StarTAC reflected a shift toward more compact device.
The move proved wise, as the StarTAC was among the first mobile to gain widespread consumer adoption.
Its emergence also marked the broader industry's graduation from a standard 1G to a 2G network.
Apple changed the mobile industry when it released the first iPhone on June 29, 2007.
The dominant operating systems at the time included BlackBerry OS, Symbian and Windows Mobile, but the iOS was a much more capable system that let users tap into Apple's robust ecosystem.
Fans across the U.S. lined up in front of Apple stores to be among the first to get their hands on the device, then priced at $499 for the 4 GB model and $599 for the 8 GB model
Apple is now in the sixth generation of the device, with its iPhone 5 model, which launched last fall.
(Click for the Entire CNBC Slideshow "Phone Calls to Facetime: 40 Years of Cellphones")
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