It also illustrates how desktop behavior, just like our preferences on smartphones, has migrated to apps and away from enterprise software suites.

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Gartner tracks ten different categories of SaaS applications in this latest forecast with CRM, ERP, and Web Conferencing, Teaming Platforms, and Social Software Suites being the three largest in terms of global revenue growth.

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He concedes that "Wintel" machines have similar suites of software, but points out that Apple is the leader in ease of use.

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DOJ, the market is that served by companies that sell complete suites of business software to big firms.

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The biggest computer-aided engineering software firms, Ansys, Dassault Systemes and LMS International, a Siemens subsidiary, have enjoyed double-digit revenue growth in recent years as large customers snap up their pricey suites of simulation and material analysis software.

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Jive Software, IBM Connections, Yammer and other social business suites offer APIs and frameworks for embedding its functionality or putting a collaborative chrome around other applications.

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