Houseguests, technological literacy, and the goddamned wifi: a single chart
by Cory Doctorow from on (#291HS)
Randal Munroe nails it again in an XKCD installment that expresses the likelihood that your houseguests will be able to connect to your wifi (I confess to having been the "firmware" guide -- but also, having been reminded to do something about my own firmware when other difficult houseguests came to stay).