===== Cloud =====

==== Business Models ====

== IAAS (Infrastructure As A Service) : ==
  * The base layer
  * Deals with Virtual Machines, Storage (Hard Disks), Servers, Network, Load Balancers etc
  * e.g. Amazon AWS Cloud

== PAAS (Platform As A Service) : ==
  * A layer on top of IAAS
  * Runtimes (like java runtimes), Databases (like mySql, Oracle), Web Servers (tomcat etc)
  * E.g. Azure, Google App Engine

== SAAS (Software As A Service) : ==
  * A layer on top on PAAS
  * Applications like email (Gmail, Yahoo mail etc), Social Networking sites (Facebook etc)
  * e.g. Photoshop Online, Office 365

== CAAS (Container As A Service) : ==
  * Provides (Docker) Container Hosting, Monitoring
  * e.g. DockerDataCenter, Amazon EC2 Container Service