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A Phone That Knows Youre Busy A bunch of behavior sensorsand a clever piece of software could do just that，by analyzing your behavior to determine if its a good time to interrupt you.If built into a phone，the system may decide youre too busy and ask the caller to leave a message or ring back later. The potentialbusynesssignals they focused on included whether the office doors were left open or closed，the time of day，if other people were with the person in question，how close they were to each other, and whether or not the computer was in use. The model showed that using the keyboard，and talking on a landline or to someone else in the office correlated most strongly with how interruptible the subjects judged themselves to be. The first application for Hudson and Fogartys system is likely to be in an instant messaging system，followed by office phones and cellphones.There is no technological roadblock to it being deployed in a couple of years， says Hudson A they must tolerate phone disturbances or miss important calls. C they have to switch from a desktop phone to a cellphone. 37 The behavior sensor and software system built in a phone B could send messages instantly D could identify important phone calls. A why office doors were often 1eft open. | 
