npm is a package manager for Node.js

Node.js

Node.js is a software system designed for writing highly-scalable internet applications, notably web servers.Programs are written in JavaScript, using event-driven, asynchronous I/O to minimize overhead and maximize scalability....

 that is run through the command line and manages dependencies for an application. It is the predominant package manager for Node.js.

According to its author, npm is not an acronym for "Node Package Manager."

As of Node.js version 0.6.3, npm is deployed and installed automatically with the environment.

See also

• JavaScript
  JavaScript
  JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles....
  
  
• V8 (JavaScript engine)
  V8 (JavaScript engine)
  The Google V8 JavaScript Engine is an open source JavaScript engine developed by Google and ships with the Google Chrome web browser. Lars Bak is the head programmer....
  
  
• Node.js
  Node.js
  Node.js is a software system designed for writing highly-scalable internet applications, notably web servers.Programs are written in JavaScript, using event-driven, asynchronous I/O to minimize overhead and maximize scalability....
  
  
• JSAN
  JSAN
  The JavaScript Archive Network is an on-line collaborative resource to develop Open Source libraries and software for JavaScript. JSAN's aim is to create the JavaScript equivalent of Perl' s CPAN. For example, the module Joose is an equivalent to the CPAN module Moose...
  
  , the JavaScript Archive Network – a lesser used JavaScript package manager.