Secondary Disk Storage

The invention of the Gutenberg Press lead to the start of the first "information revolution" as the printed word was used to widely disseminate ideas and concepts throughout the world. Structural change caused by how information was controlled and communicated radically changed the social structure of its day. The pace of this information revolution was remarkable, as the number of published books rose from some 30,000 in 1454 AD to over 3,000,000 by 1500 AD [2].
In the late 1940's IBM began research and development on a new technology known as the Tape Processing Machine. Their initial in…