HP J Class Owner's Manual page 246

click
To press and release a mouse button. The term comes from the fact
that pressing and releasing most mouse buttons makes a clicking
sound.
cluster
A group of workstations connected via a Local Area Network (LAN).
One workstation, the cluster server, performs as a file–system server
for the cluster clients. See also cluster client, cluster node, cluster
server.
cluster client
A cluster node that does not have a local HP–UX file system. Its file
system resides on the cluster server. See also cluster, cluster node,
cluster server.
cluster node
A member of a group of workstations connected via a Local Area
Network (LAN). One workstation, the cluster server, performs as a
server to the cluster. See also cluster, cluster client, cluster server.
cluster server
A workstation that provides file access, login access, file transfer,
printing, and other services across a network to a defined cluster of
systems (cluster nodes) connected via a LAN. See also cluster, clus-
ter client, cluster node, host.
command
An instruction that you enter into the system at a prompt, to execute a
program or perform a task. See also shell command.
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