Platform as a Service (PaaS): To understand this cloud computing
layer one needs to remember the traditional computing
model where each application managed locally required hardware,
an operating system, a database, middleware, Web servers,
and other software. One also needs to remember the team of network,
database, and system management experts that are needed
to keep everything up and running. With cloud computing, these
services arenowprovided remotely by cloud providers under this
layer;