iOS

1. advantages

1.1. hardware

1.1.1. uniform

1.2. software

1.2.1. Muti-functional

1.2.1.1. GPS

1.2.1.2. Checking the Weather

1.2.1.3. Watching Video

1.2.1.4. Playing games

1.2.2. game

1.2.2.1. bigger and better library of available games

1.2.3. Consistent User Experience

1.2.4. browsing

1.2.4.1. Better HTML5 Support

2. disadvantages

2.1. hardware

2.1.1. lack of NFC support

2.2. software

2.2.1. woven ecosystem

3. apple

3.1. ipod touch

3.2. ipad

3.3. imac

3.4. mac book

3.5. iphone

4. background

4.1. brand&device

4.2. history

4.2.1. released in June, 2007

4.2.2. rebranded as iOS in June ,2010

4.3. competitors

4.3.1. Symbian

4.3.2. BlackBerry

4.3.3. Android

4.3.4. Windows Phone

4.3.5. Palm OS

4.3.6. Beda

5. application

5.1. Siri

5.2. Game Center

5.3. iTunes