Apple’s Worldwide Developers Conference starts Monday, and all indications are that it’s going to be a big one. WWDC has long been the place to be if you want to get an early glimpse at the future of iOS and OS X, and already iTunes chief Eddy Cue has teased that Apple’s product lineup this year is the best one that it’s had in over two decades.

The first fruits of that labor should arrive next week, though you won’t necessarily see it in new hardware. WWDC has become a show that’s all about software, and the software that Apple demonstrates is all meant to prepare it and developers for the products to come over the next several months. Usually, there are a good few hints as to what those may be too.

As for what Apple will actually show at WWDC, some things are all but certain, others much less so. Here are the 13 of the biggest things coming up for Apple — many of which we’re likely to see at WWDC, and others that we may only see the faintest signs of. And even if they’re not all announced, it’s our best guess as to just what’s coming in the “best product pipeline” Apple’s had in decades.