What is the first sliding puzzle commonly known as?

• Rubik's Slider
  It took its name from its 4-by-4 grid with 15 tiles and one empty space.
• The 15 Puzzle
  It took its name from its 4-by-4 grid with 15 tiles and one empty space.
• Tic Tac Toe
  It took its name from its 4-by-4 grid with 15 tiles and one empty space.