I read all of Bernie's platform in 2016 when it was most thoroughly developed, and he didn't call for state ownership of companies like Intel. The closest he got to what you are thinking was calling for public ownership of utilities, which is standard in most capitalist countries, namely buying out/converting private electricity utility monopolies into either public or cooperative ownership.
Also, socialism means whatever the ruling class says it means. For example in China they've redefined socialism to just mean nationalism, which is the opposite of the original intent. Read about "Xi Jingping Thought" and "Socialism with Chinese Characteristics". It seems when ideas like socialism become popular, they are co-opted and stripped of meaning.