Where’s the key?
You know how, in some office buildings, you have to use a key to access the restrooms? If all the keys go missing, it can be a bad thing.
That would never happen if one of the following ideas was used:
- The fob on the keyring contained an RFID chip
- The fob was the kind of thing restaurants use for waiting customers: flashing lights and a vibration mechanism
I bet these could work for hall passes in schools too … hmmm …
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