The strain of Conservatism that Mr Cameron embodies has thus become unfamiliar.

ECONOMIST: David Cameron

They must move beyond their area of strength and comfort into the unfamiliar territory of trying to become a software platform company.

FORBES: Steve Jobs' Own Words From His Last Earnings Call

Long slogs out of recession are not unfamiliar to Americans, who have become used to jobless recoveries.

ECONOMIST: America's labour market