Final answer:
The strengths of the mentioned system include a streamlined user interface, personalization features, integration among devices, and universal inbox functionality.
Step-by-step explanation:
- Streamlined, fluid user interface, and around 900,000 apps.
- Personalization features and ability to run on a variety of devices.
- Integration among mobile device and desktop counterpart.
- Universal inbox operating system Android, iOS, Windows Phone, BlackBerry.