People talk about Big Tech. These are the biggest IT companies in the world. First, there were the Big Five: Apple, Alphabet, Amazon, Meta, and Microsoft. Alphabet is the company that owns Google, and Meta is the company that owns Facebook. These are some of the most valuable companies in the world. Now people are talking about the Magnificent Seven. There are two newcomers, Tesla and NVIDIA.  Tesla is the electric car company, and NVIDIA is a company that makes software and hardware for AI. Everybody wants to use AI these days, so NVIDIA has been growing bigger and bigger. In fact, it became the world’s most valuable company in the middle of this month.     　　(115 words)