Abstract: A system and method for receiving travel information such as flight information, directional guidance to airport gates and facilities, and interacting autonomously with service providers such as airlines and rental car companies without requiring human resources to receive the tickets or car keys. The system devices essentially provide an automatic chaperon which can initiate processes such as querying databases or provide navigation guidance without intervention, setup procedures or any prior knowledge on behalf of the user. It can also access secured databases for retrieving rental car reservation information for automatic rental car checkout, personal health files for emergency cases, flight check-in, connecting flight information and call for emergency staff alerting the staff automatically of the caller's location within the compound, as well as recent health history and condition.

Abstract: A method for caching specified data in an n-way set associative memory with a copy-back update policy consists of the following steps. First, a row of the associative memory, organized as a plurality of rows and having n ways per row, is selected according to the main memory address of the specified data. The main memory provides primary storage for the data being cached. If one of the ways of the selected row holds invalid data, the specified data is cached in the way holding the invalid data and the data caching process is discontinued. If all n ways of the selected row hold valid data, the following steps are performed. First, a replacement strategy is used to select a way from the selected row. If the way selected in accordance with the replacement strategy holds unmodified data, the specified data is cached in the way selected by the replacement strategy and the data caching process is discontinued.