A person who actively seeks or takes advantage of opportunities.
A person who subsists on still-edible food that has been or was going to be discarded.
One who will generally eat whatever is available, having a diet that excludes few foods.
A person who conforms to current opinions, especially for reasons of personal advantage; an opportunist.
A device, node or program that transmits the correct time to clients in a network.
Someone who performs a job for the required time only, making a minimum of effort.