Graham Anthony RichardLockwas an English cricketer, who played primarily as a left-arm spinner. He played in forty nine Tests for England taking 174 wickets at 25.58 each... (wikipedia)
Virtualization today is one of the hot topics in storage management. It offers hope to alleviate many of the operational and cost pains associated with the acquisition and ongoing administration of an increasingly complex storage world.
There are a few organizations of 20 people that have major storage requirements. These are extremely specialized companies and, with such a high dependence on IT and data storage, they usually have SAN capabilities.
Issues that are traditionally associated with thin clients go away with streaming technology.
You should delete any information that you are certain you do not need to keep legally and that has no potential value in the future. Frankly, this does not leave a lot of room to delete anything, and I suspect that soon it will be accepted that no data is ever truly erased.
The vast majority of small organizations use DAS. Some may have some form of networked storage and a small percentage may have major storage requirements.