This diagram is from "How the Cloud Changes Software Production", by Seth Eliot, Better Software Magazine, March/April, 2011 - http://bit.ly/seth_cloud_better_software

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Figure 1 Cloud Resources by category form a stack


This table is a variation of that included with the "Sticky Notes" for "How the Cloud Changes Software Production", by Seth Eliot, Better Software Magazine, March/April, 2011 - http://bit.ly/seth_cloud_better_software

Cloud Category

The Cloud handles...

Examples

     

SaaS:
Software as a Service

Application Functionality such as...

Mail Clients

Gmail
Hotmail
Yahoo Mail
Microsoft Outlook Web Access

Office Applications

Microsoft Office Web Apps
Google Docs

Music Storage and Playback

mspot
iCloud

     

PaaS:
Platform as a Service

Relational Database Management Systems

Microsoft SQL Azure
Amazon RDS

Frameworks and Runtimes

Microsoft Windows Azure - .NET
Google App Engine - Java & Python

Web Servers (Web Hosting)

SquareSpace

Content Delivery Network

Amazon CloudFront
Microsoft Windows Azure Content Delivery Network

Operating Systems

Cloud Servers generally come with an OS, so see "Servers" under IaaS below.

     

IaaS:
Infrastructure as a Service

Servers

Amazon EC2 - Linux Servers
Rackspace Cloud Servers - Linux Servers

Storage

Amazon S3 - BLOB storage
Amazon SDB - Table Storage
Microsoft Windows Azure Storage - Both table and BLOB