But if you take into account the use of open source products like Xen and KVM in massive data centers, web server farms, and by web application providers like Google and Salesforce.com, the CPUs running open source virtualization likely dwarfs the commercial market.

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"We think all the Web pages need to be generated from an application server that end users can access and that is tied to back-end databases, " says Burson, who believes NetWare 5.1 will address this issue.

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Developing applications for the new Web environments or even for the old client-server ones with less resource constraints changes how we think of application functionality.

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