Apple's Worldwide Developers Conference has been an important event on the Apple calendar since as far back as the 80s, but has become increasingly known for Apple hardware and software announcements over the past ten years. With this year's event selling out in just two minutes, it's clear that developers and Apple watchers are anticipating something big.

Here, we take a look back at Apple's WWDC announcements over the past ten years.

WWDC 2003

When: 23 June

Where: Moscone Center, San Francisco

What was announced?

In 2003, Apple announced the Power Mac G5 during WWDC. We were also treated to a preview of Mac OS X Panther 10.3. Safari made its first move out of beta and Apple introduced 'iApps', which later became 'iLife' suite.

WWDC 2004

When: 28 June

Where: Moscone Center, San Francisco

What was announced?

In 2004, Apple introduced its Cinema Displays, and showed off Mac OS X Tiger for the first time. Attendees reached 3,500 this year, which Steve Jobs noted was a 17 per cent improvement over 2003's turnout.

[image: Biography.com]

WWDC 2005

When: 6 June

Where: Moscone Center, San Francisco

What was announced?

In 2005, Steve Jobs took to the stage to reveal to the conference's 3800 attendees that, going forward, Apple would be partnering with Intel.

Reminisce:

WWDC: Analysts react to Intel bombshell

WWDC: Intel move no threat to Linux

WWDC: Apple-to-Intel project's five-year history revealed

WWDC 2006

When: 7 August

Where: Moscone Center, San Francisco

What was announced?

WWDC 2006 saw the launch of the Mac Pro, which replaced the Power Mac G5 as Apple's professional desktop computer. Developers got their first look at Mac OS X 10.5 Leopard during the conference, though the new operating system wouldn't be available to Mac users until the following year. Time Machine was also revealed. 4,200 developers attended WWDC 2006 as the event's popularity grew further.

[Image: One Digital Life]

Reminisce:

WWDC: Leopard, Apple says 'Hasla la vista, Vista'

WWDC: Leopard Server

WWDC: Opinion – Liking Apple's plans

WWDC: What you need to know about the Mac Pro

WWDC 2007

When: 11 June

Where: Moscone Center, San Francisco

What was announced?

Apple used WWDC 2007 to show off a feature-complete beta of Mac OS X Leopard, which would be released later that year. Safari made its way onto Windows PCs, and developer tools for the iPhone, which had been launched in January of 2007 at Macworld, were also shown off. Steve Jobs announced during the Apple keynote that there were a record-breaking 5000 attendees at WWDC 2007.

[Image: Shazron/Flickr]

Reminisce:

WWDC: Analysts mixed optimism at Apple futures

WWDC 2008

When: 9 June

Where: Moscone Center, San Francisco

What was announced?

WWDC 2008 was Apple's first sell-out WWDC. It saw the unveiling of the iOS App Store, the second iteration of iPhone OS (iOS 2), the iPhone 3G and a preview of Mac OS X Snow Leopard 10.6. .Me was rebranded to Mobile Me too.

Reminisce:

WWDC 2008 keynote – Live UK feed

WWDC 2009

When: 8 June

Where: Moscone Center, San Francisco

What was announced?

Sold out for the second year in a row (a trend that has continued right through to 2013's WWDC), WWDC 2009 was host to the unveiling of iPhone OS 3. Further demonstrations of Snow Leopard took place at the event, the 13in MacBook Pro was unveiled, and the 15in and 17in MacBook Pros were refreshed. If that's not enough, Apple also announced the iPhone 3GS during the event. Apple's marketing boss Phil Schiller took to the stage to present the WWDC keynote in 2009, in the place of Steve Jobs due to illness that caused the co-founder to take medical leave from the company.

[Image: Adam Jackson/Flickr]

Reminisce:

WWDC 2009 Keynote

WWDC: Apple releases Safari 4 for Mac, Windows

WWDC: Mac OS X installed user base has tripled in two years, says Apple

WWDC 2010

When: 7 June

Where: Moscone Center, San Francisco

What was announced?

In 2010, Apple announced the iPhone 4 and officially renamed its iPhone OS as iOS. The FaceTime and iMovie app for iPhone were unveiled too. WWDC 2010 sold out in just eight days. Not much attention was paid to Mac OS X this year, though, which frustrated some developers. See: Why WWDC 2010 doesn't add up for me

[Image: Adam Jackson/Flickr]

Reminisce:

WWDC 2010 Live Feed

WWDC: iPhone timeline

WWDC: iPhone 4's Retina display explained

View Review: iPhone 4

Apple iPhone launches to great expectations

WWDC: iPhone OS gets new name, video calling

WWDC: With iOS, Apple gets the OK to borrow a Cisco name

WWDC 2011

When: 6 June

Where: Moscone Center, San Francisco

What was announced?

2011's WWDC saw Apple give us our first look at Mac OS X Lion and iOS 5. Steve Jobs also unveiled iCloud during the event, which sold out in under 12 hours.

Reminisce:

Replay: WWDC 2011 keynote

WWDC: Apple lifts the lid on iOS 5

WWDC: Mac OS X 10.7 Lion to launch in July

WWDC 2012

When: 11 June

Where: Moscone Center, San Francisco

In 2012, Apple used its WWDC to announce new models of the MacBook Air and MacBook Pro, as well as the MacBook Pro with Retina Display. OS X Mountain Lion and iOS 6 were shown off too. 2012's WWDC sold out within two hours.

Reminisce:

WWDC 2012 live feed

WWDC 2012: Apple's iPhone and the iRobot supply chain

Apple decorates WWDC 2012 venue with banners

Apple's WWDC ticket fiasco

WWDC: iOS 6 unveiling sees Siri come to iPad

WWDC 2013

When: 10 June

Where: Moscone Center, San Francisco

This year, Apple is expected to unveil OS X 10.9 and iOS 7 at WWDC 2013. We could also see the launch of a new Mac Pro and new MacBooks, according to reports. All 5000 tickets for the event sold out within two minutes of going on sale, a record for the event.

When Apple announced WWDC earlier this year, the accompanying press release read: "At the five-day conference, developers from around the world will learn about the future of iOS and OS X, enabling them to create incredible new apps with innovative features," the press release reads. "WWDC will also feature more than 100 technical sessions presented by over 1,000 Apple engineers, hands-on labs to help developers integrate new technologies, as well as the popular Apple Design awards, a showcase of the most outstanding apps available through the App Store and Mac App Store."

Apple has released a free WWDC 2013 app for iOS, which developers can use to watch daily session videos and more.

We will be bringing you all of the latest news from WWDC 2013 next week, including a live feed from the official Apple keynote on 10 June, which starts at 6pm UK time.

See: What to expect from Apple at WWDC 2013

AND: Decoding Apple's WWDC 2013 logo: what does it mean?

See also:

Watch every Steve Jobs 'One more thing'

Apple is growing; why not WWDC?