Amazon.com was the first such provider , modernizing its data centers which , like most computer networks were using as little as 10 % of its capacity at any one time just to leave room for occasional spikes . Amazon played a key role in the development of cloud computing by modernizing their data centers after the dot-com bubble , which , like most computer networks , were using as little as 10 % of their capacity at any one time , just to leave room for occasional spikes .