When Steve Jobs left Apple, he joined with Ross Perot and created the NeXT computer company. Its most famous product was the ___ computer.

The NeXT computer, created by Steve Jobs after leaving Apple, is most famously known for its distinctive design, particularly the NeXT Cube. This product was notable for its unique cube-shaped case, which stood out in the tech market of the time. The NeXT Cube was an advanced workstation that featured significant advancements in computing technology, including a high-resolution display and a sophisticated operating system, which later became foundational to the development of macOS.

The other options do not accurately represent the iconic product associated with NeXT. Terms like stack, table, and ring do not correlate with any of the well-known products from NeXT, with "cube" being the correct and historical identifier for this influential computer.