The document discusses the top 10 cloud service providers:
1. Amazon EC2 provides scalable computing resources that can be accessed over the internet and only pay for what is used.
2. Verizon offers vCloud Express which provides flexible and on-demand computing resources through an intuitive web console.
3. IBM provides private, hybrid, and public cloud solutions including infrastructure, platforms and software as a service.
It then briefly describes each of the top 10 providers and their key cloud computing offerings.