CU on woman flipping through cards and writing down location to retrieve item - Woman hands reference card to man at desk who puts it in a message tube sent to different parts of library. CU on man walking through stacks to retrieve specific book. Book put on a conveyor belt which travels through the different levels to a man who puts book in another message package which is sent through tubes to another belt carrying item to original requested location - CU on woman looking at the book retrieved for her.