upstream

from WordNet (r) 3.0 (2006)

upstream
    adv 1: toward the source or against the current [syn: {upriver},
           {upstream}] [ant: {downriver}, {downstream}]
    adj 1: in the direction against a stream's current [ant:
           {downstream}]

from The Collaborative International Dictionary of English v.0.48

Upstream \Up*stream"\, adv.
   Toward the higher part of a stream; against the current.
   [1913 Webster]

from Jargon File (4.4.4, 14 Aug 2003)

upstream
 adj.

   [common] Towards the original author(s) or maintainer(s) of a project.
   Used in connection with software that is distributed both in its
   original source form and in derived, adapted versions through a
   distribution (like the Debian version of Linux or one of the BSD
   ports) that has component maintainers for each of their parts. When a
   component maintainer receives a bug report or patch, he may choose to
   retain the patch as a porting tweak to the distribution's derivative
   of the project, or to pass it upstream to the project's maintainer.
   The antonym downstream is rare.

from The Free On-line Dictionary of Computing (8 July 2008)

upstream
downstream

   <networking> Fewer {network} {hops} away from a {backbone} or
   {hub}.  For example, a small {ISP} that connects to the
   {Internet} through a larger ISP that has their own connection
   to the backbone is {downstream} from the larger ISP, and the
   larger ISP is {upstream} from the smaller ISP.

   (1999-08-05)