求解whitney tilson大牛说的三个Tech Titan股票和一个The Dividend Machine是啥

这臭长的文章说了半天遮遮掩掩，就是想卖书。求解这个4个股票。可以直接拉到一半多点的地方开始。谢谢！！

Tech Titan #1: The Company That Could Soon Revolutionize How Americans Take Care of Their Health

Tech Titan #2: The Company Dominating the Business Behind Artificial Intelligence

Tech Titan #3: The Only Augmented Reality Company on the Path to a Billion Users

The Dividend Machine