Hello everybody,

today I want to put some light on puzzlewords related to Windows Azure.

Quite often many people are puzzled by statements SaaS, PaaS, IaaS. If you need quickly understand what those words mean, 

just look at the picture.

If to decipher them with examples, then 

SaaS example

Office 365, Bing, gmail.

PaaS example

Something, that you can borrow for your life simplification. For example Access control service, service bus, HD Insight, Windows Azure Active directory, Azure SQL server database.

IaaS example

Renting one or more virtual servers and probably their network equipment ( also virtual ) in order to host something like Sql Server, Active directory, Sharepoint server etc.

Levels of responsibility

After general overview you can agree, that more freedom you have, the more responsibility comes more responsibility.

Take a look at table below.

This table means the following, if you want to provide to end users SaaS ( for example if you want to provide to others your version of Office 365 ) you'll be responsible for applications, data preserving, etc.

But if you want to use IaaS, your area of responsibility will be smaller, and will start from Virtualizaton, Servers, storage.