| 摘要 |
Disclosed are distributed systems and methods for managing multiple items. An exemplary system includes a user interface that allows a user to specify a date and time of day. The exemplary system also includes a plurality of portable devices, which may be attached to objects, such as bracelets or documents. Each portable device includes a wireless receiver configured to receive a signal corresponding to a date and time of day specified at the user interface. When the specified time arrives, the portable device emits a sound to alert someone.
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