con

   [from  SF  fandom]  A  science-fiction  convention. Not used of other
   sorts  of  conventions,  such  as  professional  meetings. This term,
   unlike  many  others imported from SF-fan slang, is widely recognized
   even  by  hackers  who aren't {fan}s. "We'd been corresponding on the
   net for months, then we met face-to-face at a con."

[glossary]
[Reference(s) to this entry by made by: {fan}{on the gripping hand}]