The social bookmarking innovator del.icio.us automatically reminds users of previously deployed tags, suggests some tags, and notes tags used by others. Third, people tend to tag socially. That is, they learn from other taggers and respond to other, published groups of tags, or “tagsets.”6 There are of course limitations to folksonomies, including the difficulty in scaling up tags from several to many users and the problem of quickly grasping contextual shifts between tagsets. But the rapid adoption and growth of folksonomies is noteworthy
York, Pennsylvania arrived on "
Brisbane, Queensland arrived from 
Henstedt-ulzburg, Schleswig-Holstein arrived from 
Cairo, Al Qahirah arrived on "
