It is often used in modular networking devices. Slot: A slot is a space within a chassis or device where a module or card can be inserted. It provides the physical and electrical connections for the module or card to function within the larger networking device.
Slot data system means the collective hardware, software, communications technology, and other ancillary equipment used to collect, monitor, interpret, analyze, authorize, report, and audit data with regard to activity at a slot machine, including slot machine meter readings, error conditions, security, accounting, ...