Node-locked licenses (the third character of the serial number is "N") are associated with a particular computer. To use your product on a computer other than the one on which you have it activated, and without consuming another license, you can transfer your license from one computer to another. For example, you received a new computer at work and you want to run your product on the new computer instead of on the old one. The number of transfers available per year is dependent on the options your organization chose when purchasing the licenses.