Steve Jobs reveals iCloud, iOS 5 and OS X Lion - in pictures

Attendees queued for hours to get good seats for the 2011 Apple World Wide Developers Conference at the Moscone Centre in San Francisco
Photograph: Justin Sullivan/Getty Images

Before they could get in, attendees – principally developers – walked past banners for the promised services. In previous years, the names of the upcoming services have been hidden ahead of the keynote; this year, Apple had named them ahead of time Photograph: Justin Sullivan/Getty Images

The song before his appearance was James Brown's I Feel Good: Apple chief Steve Jobs made a rare public appearance to open the show, and received a standing ovation from the audience. After a few words he handed over to marketing chief Phil Schiller and was off-stage for almost 90 minutes Photograph: Paul Sakuma/AP

In his introduction, Steve Jobs set out the main elements that the presentation would cover: Mac OS X 10.7 (Lion), iOS 5 for iPhones and iPad, and iCloud Photograph: Kimihiro Hoshino/AFP/Getty Images

Craig Federighi, senior vice-president of Mac software engineering, demonstrates some features of Apple's Mac OS X 10.7 (Lion). For the first time ever, Lion won't be available on a DVD or CD – it will be a 4GB download from the App Store, meaning people will have to have upgraded to Mac OS X 10.6 (Snow Leopard) before they can get it. Lion will cost $30 (£21) and be available in July Photograph: Kimihiro Hoshino/AFP/Getty Images

Scott Forstall, senior vice-president of iPhone software, jokes with Jobs as he hands back the remote control after his part of the WWDC presentation Photograph: Justin Sullivan/Getty Images

Jobs in front of the icons of all the new applications in iCloud, which will replace the not-greatly-loved MobileMe from the autumn. iCloud encompasses email, calendars, music, apps, ebooks, documents, photos, and contacts. The green icon on the right is the overall 'iCloud' icon for syncing Photograph: Marcio Jose Sanchez/AP

With iCloud, the concept of the 'digital hub' that Jobs unveiled in 2001 moves from the desktop to the cloud. Here, Jobs talks about the photo component, which will save your most recently uploaded 1,000 photos for 30 days Photograph: Marcio Jose Sanchez/AP

Apple has built a server farm with half a million square feet of space in Charlotte, North Carolina, near a source of hydroelectric power. The inside looks like this – and Apple has two more elsewhere Photograph: Marcio Jose Sanchez/AP

After the event, developers spilled out into the conference centre. Much of the talk was about the services that Apple seemed to have killed, or threatened – including Dropbox and BlackBerry Messenger – and the promise of the forthcoming updates to the software
Photograph: Monica M Davey/EPA