What measures 24" in diameter, contains 50 platters, weighs a few ton, and costs $50,000? Give up? The world's first hard drive in 1956 which weighed in at a whopping 5MB of total storage. 50 years later we are approaching the 1 Terabyte limit in single disk design. To put it in perspective, that is 200,000 times the size of the first disk in a package the size of a small paperback book.
Head over to Vnunet.com to catch a pretty interesting read on the 50th anniversary of the hard drive.