compo

Compo \Com"po\, n.; pl. {-pos}.
   Short for {Composition}; -- used, esp. in England, colloq. in
   various trade applications; as :
   (a) A mortar made of sand and cement.
   (b) A carver's mixture of resin, whiting, and glue, used
       instead of plaster of Paris for ornamenting walls and
       cornices.
   (c) A composition for billiard balls.
   (d) A preparation of which printer's rollers are made.
   (e) A preparation used in currying leather.
   (f) Composition paid by a debtor.
       [Webster 1913 Suppl.]
    

compo
 n.

   [{demoscene}] Finnish-originated slang for `competition'. Demo compos
   are held at a {demoparty}. The usual protocol is that several groups
   make demos for a compo, they are shown on a big screen, and then the
   party participants vote for the best one. Prizes (from sponsors and
   party entrance fees) are given. Standard compo formats include {intro}
   compos (4k or 64k demos), music compos, graphics compos, quick {demo}
   compos (build a demo within 4 hours for example), etc.