Brian Withers: Charles was asking about the total addressable market. I'll share the slide again. He says, "What makes up the $121 billion in TAM? It seems mystical." I think you're absolutely right.

More than 300 startups had made it for the second round of the challenge but only 100 made it to the final round. One of the slides presented by those who didn’t make it to the final round was ...

Brian Withers: Charles was asking about the total addressable market. I'll share the slide again. He says, "What makes up the $121 billion in TAM? It seems mystical." I think you're absolutely right.