Office 2010 OEM products are media-less. The customer gets shipped a card that has the product key on it and office is preinstalled on the computer from us. If you need to re-load office in the future, you need to keep your key card and download office from the website below.
http://office.microsoft.com/en-us/products/microsoft-office-2010-backup-FX101853122.aspx
This includes:
Home and Student
Home and Business
Professional