The Apple iPhone will mark its 10th birthday next January — but can anyone imagine the world without it or its principal rival, the Android-based phone launched roughly 20 months later?Neither of them were the first smartphones — mobile phones combining the convenience of cellphones with the power of computers. But they turned the smartphone from a specialized tool for a small slice of businesspeople into one found in nearly every pocket or purse.They’re still a business tool, and they’re relied on more and more by all of us, including septic pumpers and drain cleaners. And neither they — nor
