There are three main categories of cloud computing: Sofware as a Service (SaaS), Infrastructure as a Service (IaaS), Platform as a Service (PaaS).
A free and open source software for creating rich interactive learning content.
H5P = HTML 5 Package
H5P.com is a hosting service - SaaS - for anyone who wants to use H5P without having to set up and maintain their own website or hosting solution.
H5P.org is where you can try out the different content types and access examples, tutorials and re-use content types. You will also find information here on LTI and plugins.
LTI = Learning tools interoperability
LTI integration is enables users to integrate web applications with their LMS or learning platform.
Software as a service is hosted software applications, made available to customers over the Internet.