pvm_gather(3) on Linux
The text bbad70c75e65, as Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm) shipped it. The page shows this text now.
A specified member of the group receives messages from each member of the group and gathers these messages into a single array.