Apple is a bad example - they make computers, that is their core business. From chips (ok, they don't own any chip fabs, iirc they used to have their own manufacturing but later outsourced to China, but they do design) up to software, plus marketing and distribution (which is always where the money is - eg Nike makes boatloads selling shoes while the sweatshop workers are paid pennies). The iPhone? It's a computer with access to cellular networks. The iPad? It's a computer. Everything Apple has made since OS X in ~2000 is a Unix computer. Even, if I'm not mistaken, watchOS and tvOS are Unix based.

It's like when Mercedes/BMW et al started making SUVs after years of making sedans and coupés. It's a different form factor, but still the same basic product.