OpenAI said on Monday that it had completed a $40 billion fund-raising deal that nearly doubles the high-profile company’s valuation from just six months ago.

How much is a billion? A billion has two definitions historically and in the UK we have switched what we mean by the term in living memory.

The cryptocurrency exchange Bybit lost $1.5 billion to North Korean hackers last month — and it all traced back to an account on a free digital storage service.

PERHAPS someday Zimbabweans will have to know the answer to that question. Galloping hyperinflation has led the government to introduce a new banknote worth 100 billion Zimbabwean dollars. But ...