LOCKS 

Everything can have a lock.  Success or failure depends on how the 
lock is set up.  '@lock object=#0' will cause everyone to fail against 
the lock.  Locks can be boolean expressions, using parentheses (), and 
&, or |, and not !.  Players must be referenced with an asterisk *.  
You can also lock according to gender, sex:male or sex:female.  
Example: '@lock women's restroom=sex:female|*Janitor|(sex:male&key)'  
Keys are things that you can @create.