UML interaction overview diagram - Online shopping

"Online shopping or e-shopping is a form of electronic commerce which allows consumers to directly buy goods or services from a seller over the Internet using a web browser. Alternative names are: e-web-store, e-shop, e-store, Internet shop, web-shop, web-store, online store, online storefront and virtual store. Mobile commerce (or m-commerce) describes purchasing from an online retailer's mobile optimized online site or app.
An online shop evokes the physical analogy of buying products or services at a bricks-and-mortar retailer or shopping center; the process is called business-to-consumer (B2C) online shopping. In the case where a business buys from another business, the process is called business-to-business (B2B) online shopping. The largest of these online retailing corporations are Alibaba, Amazon.com, and eBay. Retail success is no longer all about physical stores. This is evident because of the increase in retailers now offering online store interfaces for consumers. With the growth of online shopping, comes a wealth of new market footprint coverage opportunities for stores that can appropriately cater to offshore market demands and service requirements." [Online shopping. Wikipedia]
The UML interaction overview diagram example "Online shopping" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Rapid UML solution from the Software Development area of ConceptDraw Solution Park.

This example of cloud computing system architecture diagram was created on the base of picture in the post "Sending Windows 8 Push Notifications using Windows Azure Mobile Services" from the Nick Harris .NET blog.
"The goal of Windows Azure Mobile Services is to make it incredibly easy for developers to add a cloud backend to their client apps be it a Windows 8, Windows Phone, iOS or Android application. ... Mobile Services today provides:
- Structured Storage
- Server Logic ...
- Auth ...
- Push Notifications ...
- Common tenants of Windows Azure Services
- Scale ...
- Diagnostics ...
- Logging ...
What are Push Notifications?
The Windows Push Notification Services (WNS) enables you to send toast, tile, badge and raw notifications from the cloud to your Windows Store applications even when your app is not running. Push notifications are ideal for scenarios when you need to target a specific user with personalized content.
The following diagram depicts the general Lifecycle of a push notifications via the Windows Azure Notification Service (WNS). We’ll walk through the steps shortly but before doing so I thought it would be important to call out that as a developer implementing a push notification scenario all you need to do is implement those interactions in grey and the applications/ services in blue." [nickharris.net/ index.php/ 2012/ 10/ 04/ blog-series-sending-windows-8-push-notifications-using-windows-azure-mobile-services/ ]
The diagram example "Push Notification Lifecycle Overview" was created using ConceptDraw PRO diagramming and vector drawing software extended with the Azure Architecture solution from the Computer and Networks area of ConceptDraw Solution Park.