To successfully perform a power-on self-test.
An HTTP request method used to send an arbitrary amount of data to a web server.
To perform a headspring.
A move in which the gymnast places both hands on the mat with the top of the head about 6 inches in front, pushes off with the hands while flipping the legs overhead, and lands on the feet.
A fountainhead; a source.
A basis or foundation.
A spring that sits at the top of a mechanism, pushing the internal parts inward.