The term NX stands at least for two products

- NX remote access framework (see http://www.nomachine.com/developers.php)

  [[Explain pertinence to [Tcl].]]

  Mark comments, "... positively impressed by NX's performance, working on my old pentium laptop from work is almost as fast as working locally. Added plus is the possibility to connect through a proxy."

- NX is used as abbreviation for the Tcl extension [next-scripting], a scripted OO langauge based on the Next Scripting Framework [NSF]