Definitions for "Expandability"
Extra handsets (extensions) can be used with a single base unit, without the need for additional wiring.
The ability of a system to accommodate expansion. In hardware, this may include the addition of more memory, more or larger disk drives, and new adapters, and in software may include the ability of a network to add users, nodes, or connections to other networks.
Keywords:  ieee, extendability, see
see Extendability [ IEEE 90].