Press the Home button twice, either the physical button on the iPhone or the Assistive one, to see all the apps that are running. You can now quickly move amongst these apps – multitasking! To close an app, simply select it and push (slide) it to the top.
The computer's "Copy-n-paste" feature was first implemented in the Gypsy word processor developed at Xerox Palo Alto Research Center in 1970s. [more...]