I wrote code for an employer in 2000 or 2001 that checked against a user's availability, which could be as precise as a half hour, and sent out of office notifi

I wrote code for an employer in 2000 or 2001 that checked against a user's availability, which could be as precise as a half hour, and sent out of office notifications back to the sender of an email that "While so and so will be happy to answer your question, please be aware that they are not on shift until later this afternoon. If your concern is immediate, please call the help desk at blah blah blah." I wish I'd patented it then, cause I guess IBM would be infringing.