To successfully perform a power-on self-test.
An HTTP request method used to send an arbitrary amount of data to a web server.
Had best.
To surpass in skill or achievement.
To beat in a contest.
The person (or persons; or thing or things) that is (are) most excellent.
The supreme effort one can make, or has made.
One's best behavior.
To the most advantage; with the most success, cause, profit, benefit, or propriety.
Most; largest.
Most superior; most favorable.