Packet-switching was advanced by which of the following people? Sergey Brin
Leonard Kleinrock
Tim Berners Lee
Bill Gates

Google 'climate change' and it will bring up tons of info and websites. its up to you which website you choose.

I’d say platform as a service (paas) or application platform as a service (apaas) or platform base service is a category of cloud computing services that provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.