The World Wide Web? It was dreamed up on NeXTSTEP. It paved the way for macOS and all of Apple’s other modern operating systems. And as we mentioned earlier, it was crafted at a company led by a certain Steve Jobs. You might have heard of him.

Put together, it’s hard to overstate the legacy of NeXTSTEP and its innovations, both large and small. It could be the most influential operating system you’ve never heard of.