Bitcoin uses a clever scheme to maintain a fully decentralized transaction register, preventing double-spending without giving anyone de facto control over the system.

FORBES: Four Reasons Bitcoin Is Worth Studying

That is partly a question of scale: one lucky break by a smaller firm could double its reserves, but barely register at one of the majors.

ECONOMIST: Oil companies: Improving their fieldcraft | The

Its targets: To double the number of "adverse incident reports" to the national register by December 2002.

BBC: Keeping patients safe