"," Vern Raburn, a former Microsoft executive, told PCWorld in an interview in 2004. "The good news was, at least the floppies were sturdy, because you put them in and out a lot."

The iPhone 4 features a 3.5-inch-diagonal screen with 960-by-640-pixel resolution at 326 pixels per inch. The original Macintosh had a monochrome 9-inch-diagonal display with a 512-by-384-pixel-resolution bitmapped display. The iPhone 4's screen is a liquid crystal display (LCD), while the 128K had a cathode-ray tube (CRT) fluorescent screen.

The iPhone 4 is a marvel of compact design, with almost no internal real estate wasted. In this photo, you can see the logic board just to the left of the iPhone 4's 3.7V 1420 mAh lithium-polymer battery--a battery 19 percent larger than the one previous devices used.