Fire Alarm Companies

Then there's the way that Apple - in the teeth of industry scepticism - made such an astonishing success of bricks-and-mortar retailing with its high-street stores. Or ponder the fact that it became the world's most valuable corporation without incurring a single cent of debt. Instead, it sits atop a $78bn (£48bn) cash mountain: enough to buy Tesco

"Do you want to spend the rest of your life selling sugar water," he asked, "or do you want to change the world?" (Sculley accepted the invitation, then presided over Jobs's expulsion.) But for Jobs it was a serious question. What he was asking, as the blogger Umair Haque put it, was: "Do you really want to spend your days slaving over work that fails to inspire, on stuff that fails to count, for reasons that fail to touch the soul of anyone?"

It goes without saying that he is impossible to work with; most geniuses are. Yet he has built - and retained the respect of - the most remarkable design team in living memory, a group that has been responsible for more innovation than the rest of the computer industry put together. For that reason, when the time comes to sum up Jobs's achievements, most will portray him as a seminal figure in the computing industry. But Jobs is bigger than that.

, each of these industries started out as an open, irrationally exuberant, chaotic muddle of incompatible standards, crummy technology and chancers. The pivotal moment in the evolution of each industry came when a charismatic entrepreneur arrived to offer consumers better quality, higher production values and greater ease of use.

Jobs is from the same mould. He believes that using a computer should be delightful, not painful; that it should be easy to seamlessly transfer music from a CD on to a hard drive and thence to an elegant portable player; that mobile phones should be powerful handheld computers that happen to make voice calls; and that a tablet computer is the device that is ushering us into a post-PC world. He has offered consumers a better proposition than the rest of the industry could - and they jumped at it. That's how he built Apple into the world's most valuable company. And it's why he is really the last of the media moguls.