Modern Marvels: DVD, CD, PDA, HDTV, PVR--they are the ultimate in "gotta have it" gadgets and gizmos and "to die for" technology that populate a digital world of acronyms. We trace digital technology back to the early 1940s and the first high-speed electronic computer used to calculate cannon trajectory charts for new artillery in WWII, and look at the rapidly approaching future in places such as MIT's Media Lab, where tomorrow's technologies are being developed today.