For decades, Microsoft has made the software that runs a majority of the world’s personal computers, leaving a gang of outside hardware companies to design the machines. Apple, its rival, makes it all. Microsoft is about to concede that Apple may be onto something. On Monday, Microsoft is expected to introduce a tablet computer of its own design that runs a new version of its Windows operating system, according to people with knowledge of Microsoft’s plans who declined to be identified discussing confidential matters. Read the full story at The New York Times.