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Welcome to the J Showcase. Take a tour of expository articles, view the graphics and try the puzzles. Contributions are welcomed.

  • Essays: More text than code, these articles help you learn to think in J
  • Bibliography: Bibliography of APL and J in chronological order
  • Papers: Papers on APL and J
  • Puzzles: Problems to exhibit & strengthen your J muscles
  • Share My Screen: Practical programming tasks, with step-by-step annotated solutions
  • Articles: A collection of published articles on J
  • Books: Books on J
  • Gallery: J graphics gallery
  • Studio: Basic examples of J code
  • VideoInstructionInJ: J videos