This paper addresses the question "Why "Etiquette?" What do we mean by "etiquette" in the realm of Human- Computer interaction? Does a focus on Human-Computer Etiquette provide anything more than traditional usability or human-centered design? And finally, as we explore the topic of human-computer etiquette, do the characteristics of etiquette in human-human relationships give us any special insights for human-computer interactions? This paper provides a review of these questions on the basis of the set of papers and interests expressed in the AAAI Fall Symposium on Etiquette for Human Computer Work.