The document discusses the evolution of mobile phones and the rise of the "digital multitasking generation." It describes Martin Cooper's invention of the first portable cellular phone in 1973 and the introduction of the DynaTAC phone in 1983. As mobile phones became smarter with internet access and apps, people increasingly used their phones to accomplish multiple tasks simultaneously. While some see this as advantageous, others warn that overuse of multitasking could impair concentration. The document examines how smartphones like the iPhone 4 and Blackberry Torch are marketed based on their ability to enable constant multitasking.