Microsoft is allowing customers to deploy multiple Office 2010 SKUs on the same PC in scenarios in which they need components present in one edition of the productivity suite but not in the one they are currently running.
Side-by-side and Uninstall-install are the two methods that the Redmond company recommends for the deployment of different Office 2010 suites on the same compute.
This article contains the procedures for each option. Although deploying more than one Office 2010 suite on the same computer mightn't be required by most organizations, it can be appropriate in some scenarios. For e.g., departments in an organization that currently have Office Standard 2010 installed on their computers might now need apps that're available in Office Professional Plus 2010, such as Microsoft Access 2010. For a list of the apps included in the different Office 2010 suites, see Microsoft Office Suites.