All Office Pro licenses are single-user only. Office Home & Student has a household license, for up to 3 PCs, but that can't be used for business purposes. That said, the 2-PC Pro edition can be installed on two laptops.

See: http://office.microsoft.com/en-us/bu...101825640.aspx

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]