Otherwise enqueue any successors (the direct child nodes) that have not yet been discovered.

A communication port is essentially a FIFO that can enqueue either messages waiting to be received by a process, or processes waiting to receive a message (but never both).

Upon arrival of the report segment, the sender will cancel its timer and enqueue a report-acknowledgement for the receiver and informs the application that all red data has been successfully transmitted.

For example, Perl and Ruby allow pushing and popping an array from both ends, so one can use push and shift functions to enqueue and dequeue a list (or, in reverse, one can use unshift and pop), although in some cases these operations are not efficient.

As East Germany's Deutscher Fußball-Verband was to finally merge into Deutscher Fußball Bund after that, the 1990-91 season worked out to be the factor for those former DDR-Oberliga clubs to enqueue into the German soccer league structure.