Services Models
IaaS provide processing, storage, networks, and other fundamental computing resources.
PaaS Deploy onto the cloud infrastructure customer applications created using programming languages and tools supported by the provider
SaaS Use the provider's applications running on a cloud infrastructure .

Software as a Service (SaaS).
The capability provided to the customer is to use the provider’s applications running on a cloud infrastructure. The applications are accessible from various client devices through a thin client interface such as a web browser (e.g., web-based email). The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, storage, or even individual application capabilities, with the possible exception of limited user- specific application configuration settings
SalesForce is a SaaS pioneers with its sales productivity solutions. SalesForce provide CRM (Sales Cloud), Customer services solutions (Service Cloud), Chatter (Enterprise social Networking)…
Google Apps features several Web applications with similar functionality to traditional office suites, including: Gmail (messaging and collaboration), Calendar, Talk (IM and voice communication), Docs (file sharing, word processing and spreadsheet functionality, presentations…)
Microsoft’s BPOS (Business Productivity Online Suite) is a set of messaging and collaboration solutions hosted by Microsoft, and consists of Exchange Online, SharePoint Online, Office Live Meeting, and Office Communications Online.
IBM Lotus Live is a cloud-based portfolio of social networking and collaboration services designed for business, it includes Lotus Live iNotes and Lotus Live Connections with Webmail, File sharing, Instant Messaging, Activities (project management), Surveys and charts features.
Workday delivers core business applications, including human resources, financial, and payroll to enterprise customers and small and medium sized businesses.
Taleo’s performance and talent management solutions help manage the employee lifecycle by matching talent with goals, while reducing process costs, improving quality of hire, and reducing risk.
Qualys offers a full range of on demand solutions to help security managers strengthen the security of their networks, conduct automated security audits and ensure compliance with internal policies and external regulations.
Cisco Webex is a provider of web conferencing, online meeting, video conferencing and webinar applications. It combines real-time desktop sharing with phone conferencing and reduce the need for people to travel and meet on site.
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