Can you believe that the hard drive has turned 50 years old? Well, it did, yesterday. PCWORLD covered the history of the device, and how we got from huge twenty pound plus devices, to the tiny things they are today.

Today, the hard drive is found everywhere–from the PCs we use daily to MP3 players and memory keys so small you can toss them in your pocket and forget you’re carrying around a hard drive. But when the hard drive was first introduced on September 13, 1956, it required a humongous housing and 50 24-inch platters to store 1/2400 as much data as can be fit on today’s largest capacity 1-inch hard drives.

Back then, the small team at IBM’s San Jose-based lab was seeking a way to replace tape with a storage mechanism that allowed for more-efficient random access to data. The question was, how to bring random-access storage to business computing?

Anyone remember 5 1/4″ hard drives?