Provisions means supplies. Cloud computing works on a simple premise. All computing requirements of user can be managed from the Internet. Management here means supplying computing needs to the user as and when he/she requests for. In other words computing resources can be supplied as "provisions". All cloud computing provisions can be classified under the following major categories
1. Application as service ( AaaS)
2. Platform as a Service (PaaS)
3. Infrastructure as a service (IaaS)
4. Software as a Service (SaaS)
