Showing interest only in oneself.

Opportunism. / (computing) The functionality of a timeserver.

Opportunistic; conforming to the status quo in order to serve one's own interests.

(operations) A service policy in which the first to arrive for service receives the service first.

Alternative spelling of first-come-first-served

(idiomatic) People will be dealt with in the order they arrive.

Describing a process of dealing with people using the principle "first come, first served".

Revenge is best or most satisfying when delayed.

(idiomatic) To take orders from two superiors or two conflicting parties.

(Internet) A simple website consisting of a single page, with a dedicated domain name, that does only one thing.