Abstract: This disclosure describes a system for managing inventory as it transitions into a materials handling facility, as it transitions between locations within a materials handling facility and/or as it transitions out of a materials handling facility. In some instances, a total weight associated with a user pattern may be monitored by sensors of a base surface and weight of inventory items may be monitored by sensors at the inventory locations. When a user associated with the user pattern retrieves an item from an inventory location, the decrease in the weight at the inventory location will correspond with the increase in total weight associated with the user pattern. Accordingly, the item may be tracked from the inventory location and associated with the user pattern based on the corresponding changes in weight.

Abstract: Described is a system and method for propagating and synchronizing the presentation of user specific information across multiple output devices. In some implementations, a location of a user is determined and user specific information is provided to a plurality of output device controllers configured to control output devices at the determined location. Control instructions are also provided instructing the output device controllers to store, render, present and/or remove the user specific information.

Abstract: This disclosure describes a system for managing inventory as it transitions into a materials handling facility, as it transitions between locations within a materials handling facility and/or as it transitions out of a materials handling facility. In some instances, a total weight associated with a user pattern may be monitored by sensors of a base surface and weight of inventory items may be monitored by sensors at the inventory locations. When a user associated with the user pattern retrieves an item from an inventory location, the decrease in the weight at the inventory location will correspond with the increase in total weight associated with the user pattern. Accordingly, the item may be tracked from the inventory location and associated with the user pattern based on the corresponding changes in weight.

Abstract: This disclosure describes techniques for utilizing sensor data to automatically determine the results of events within a system. Upon receiving sensor data indicative of an event, the techniques may analyze the sensor data to determine a result of the event, such as that a particular user associated with a user identifier selected a particular item associated with an item identifier. The techniques described herein may determine when sensor data is to be stored for a default amount of time, and when sensor data is to be stored for a greater amount of time. By retaining data in an intelligent manner, the system is able to function accurately without unduly taxing storage constraints.

Abstract: Described is a system and method for propagating, synchronizing and expiring user specific information among multiple output devices. In some implementations, retention information is provided along with the user specific information and the output device and/or output device controller will determine when to expire the user specific information based on the retention information. In other implementations, the output device controller and/or output device may periodically request updates from other output devices, output device controllers and/or the inventory management system to determine whether to expire user specific information.

Abstract: This disclosure describes a system for managing inventory as it transitions into a materials handling facility, as it transitions between locations within a materials handling facility and/or as it transitions out of a materials handling facility. In some instances, a total weight associated with a user pattern may be monitored by sensors of a base surface and weight of inventory items may be monitored by sensors at the inventory locations. When a user associated with the user pattern retrieves an item from an inventory location, the decrease in the weight at the inventory location will correspond with the increase in total weight associated with the user pattern. Accordingly, the item may be tracked from the inventory location and associated with the user pattern based on the corresponding changes in weight.

Abstract: Described are systems and methods for determining if assistance is to be provided to a user. In some instances, a total weight associated with a user pattern may be monitored by sensors of a base surface and a determination made if an abnormality related to the user pattern is present. If an abnormality exists, the appropriate assistance may be determined based on the abnormality and provided to the user.

Abstract: Described is a system and method for routing output information to one or more of a plurality of output devices. In one implementation, output information that includes information to be presented and a location information identifying where the output information is to be presented may be generated by an output host. The output information is received by an output router that determines, based on the location information, an output device and routes the output information to the output device for presentation.

Abstract: Described is a system and method for propagating and synchronizing the presentation of user specific information across multiple output devices. In some implementations, a location of a user is determined and user specific information is provided to a plurality of output device controllers configured to control output devices at the determined location. Control instructions are also provided instructing the output device controllers to store, render, present and/or remove the user specific information.

Abstract: Described is a system and method for propagating, synchronizing and expiring user specific information among multiple output devices. In some implementations, retention information is provided along with the user specific information and the output device and/or output device controller will determine when to expire the user specific information based on the retention information. In other implementations, the output device controller and/or output device may periodically request updates from other output devices, output device controllers and/or the inventory management system to determine whether to expire user specific information.