An electronic monitoring system is disclosed for detecting the open and closed conditions of containers or cabinets containing confidential or classified information. The arbiter is arranged so that the amount of time that each queue user can gain bus access is a percentage of the total bus time. The sols can be used to deposit catalytic coatings onto catalyst substrates, including substrates with narrow channels. In addition, a CQI channel for transmitting the existing channel quality information is released and a CQI channel for a new channel is allocated on the channel mode conversion. With a manufacturing system as such, impurities are prevented from contaminating a highly pure EL material. The multiple symbol display position grids at different depths provides that one or more of the symbols of at least a first symbol display position grid at a first depth are displayed to a player while one or more of the symbols of at least a second symbol display position grid at a second depth are not displayed to the player.