It was locked, requiring a magnetic key card to open.
Most locks can be opened with any magnetic card now.
This made magnetic cards an obvious choice for program distribution.
You make your own bed and select hotel services with a magnetic card.
Access to the parking garage and to some of the open space in the complex will be by magnetic card.
Another example was the use of a magnetic card which had a limited life.
The door was opened by means of a magnetic card.
Most such doors can now be opened with any magnetic card.
With current systems, virtually any magnetic card will open most locks.
Beyond that, each side street has its own gate, controlled by magnetic key cards.