What Is the Second Video Game Console Ever Released? Depends on Definition

It depends on the definition:

• Chronologically (commercial): Magnavox Odyssey (1972) – after the prototype "Brown Box" (1967).
• Second Most Popular All-Time: PlayStation 2 (after PS4).
• Second in 8-Bit Generation: Atari 2600 (1977) – after Odyssey.

Clarify "second" (release order, sales, generation) for a precise answer.