Internally within the Welsh Government, any realistic candidate would have to come from within the top layer of management, the Director Generals.

BBC: The hunt for a new 'Sir Humphrey'

In many cases what people are looking for is boring factual information that resides far away from the top populist layer of the internet.

FORBES: The Rise of the Knowledge Market

To change from a one to a zero, the microprocessor sends electrical currents to change the polarity of the top layer.

FORBES: Total Recall