Preservationists have resurrected parts of this service with local STAGE.DAT files, once thought to be the source of spyware.  
Jim Carpenter has reverse engineered this service's client.  Preservationists have resurrected parts of this service with local STAGE.DAT files, once thought to be the source of spyware.  It's not Teletext or Videotex, but graphics in this service were drawn using an object-oriented variant of NAPLPS rather than a pixel-by-pixel approach.  The "classic" variety of this service was closed in 1999 on a bullshit Y2K bug justification.  Russ Brown recreated this service's MadMaze game.  At one point, users of this service were charged 25 cents for each e-mail they sent after exceeding a 30 e-mail limit.  This service briefly charged an hourly rate for its popular message boards, whose posts had to be individually approved by censors.  ESPN's first online content was published on this service.  In 1990, this service was second in subscriber numbers to CompuServe, and it was eventually overtaken by AOL.  For 15 points, name this early online service.
Jim Carpenter has reverse engineered this service's client.  
Prodigy