Technology giant Apple introduced iCloud to thousands of developers on Monday at Worldwide Developers Conference (WWDC) at Moscone Center, San Francisco. The cloud based music, photo, video and data sync and download service excited the crowd present.

Below are the key takeaways from WWDC 2011 (Day 1)

11.19 am - Jobs, king of tech, back on stage

11.20 am - I get to talk about iCloud.

11.20 am - Remember how your PC was the hub for your digital life for the better part last 10 years?

11.20 am - Now devices have changed.

11.21 am - Syncing all devices such a hassle. Keeping these devices in sync is driving us crazy.

11.20 am - So digital hub moves on to the cloud.

11.20 am - All devices can connect to cloud whenever, wherever.

11.20 am - Send things to cloud from iPhone and push the same down to other devices automatically.

11.23 am - Steve Jobs looks more vibrant and excited than before

11.23 am - Some people think a cloud is just a hard disk in the sky.

11.23 am - We think it's way more than that.

11.23 am - iCloud automatically stores content in cloud and wirelessly pushes them down to all devices.

11.23 am - Including apps.

11.23 am - it just works.

11.23 am - 'WHY should we believe them? They're the ones who brought us MobileMe.

11.23 am - Crowd goes bananas as Jobs takes a dig at Apple's rare failure - MobileMe.

11.23 am - App Store now in iCloud.

11.28 am - Contacts and calendars can now be stored in cloud. And shared and pushed out.

11.30 am - iBooks works well with iCloud.

11.30 am - Devices can be wirelessly backed up in iCloud. Once daily, important content on user's device are backed up in iCloud.

11.30 am - Back up anything - music, apps, books, camera roll, device settings, app data etc

11.30 am - Even documents (pages of documents are automatically backed up and stored in the cloud).

11.30 am - Everything is automatic, seamless and effortless

11.36 am - iCloud means end of file storage system.

11.36 am - iCloud storage for APIs (!!!!)

11.36 am - crowd goes wild, wolf whistles

11.37 am - iCloud works equally well with Mac and PC

11.37 am - We thiink this is going to be pretty big.

11.37 am - Limited storage days on iCloud.

11.37 am - It does not act as your warehouse. But it makes sure that everything is synced and backed up as promised

11.37 am - Also iTunes now in iCloud.

11.37 am - Any music purchased can now be downloaded to any device for no additional charge.

11.37 am - This is the first time we've seen this in the music industry. No charge for multiple downloads on many devices.

11.50 am - Stores your content and wirelessly pushes it to all devices, and integrated with your apps, so it all happens automatically.

11.51 am - Developers can get their hands on iCloud today.

11.51 am - iCloud available today on iPhone 4.

11.51 am - iTunes in iCloud available today on iOS 4.3

11.54 am - What about music you ripped?

11.54 am - iTunes Match. It will match your ripped songs with 18 million songs in its music store.

11.54 am - Library will be scanned and matched in minutes and not weeks.

11.55 am - iTunes matched songs can be upgraded to 256kbps AAC DRM-free.

11.55 am - Any song that remains can be uploaded. Charge? Only $24.99 annual flat fees. Even for 20,000 songs.

11.56 am - It's an industry-leading model, to put it that way.

11.57 am - If you don't think we're serious about this, you're wrong.