Abstract: A bus arbitration algorithm using round robin and variable packet counts. In addition, each node is assigned a maximum packet size which can be adjusted by the operating system. The round robin determines which node will be granted the bus based on priority on a serial wrap-around list. The packet count is one factor in determining how long the node granted the bus may use it. The maximum packet size is a second factor in determining the permitted duration on the bus.

Abstract: A plurality of elongated generally rectangular panel members are provided and include first and second sets of corresponding ends. A pivot fastener is secured through and pivotally joins one set of corresponding ends of the panel members together for relative angular displacement of the panel members. The panel members are swingable from a compact position with the panel members in full registry with each other and positions with at least one of the panel members angularly displaced relative to the remaining panel members. A spacing and friction washer is disposed between each pair of adjacent panel members and about the pivot fastener whereby the panel members may be frictionally retained in relatively angularly displaced positions. Each panel member is white in color and has word defining letters formed on its opposite sides with light reflective material of a color other than white.