The distinction between commercial and public service licenses is discussed on our pricing page
Regardless of your license type, it will be delivered by email shortly after your purchase (please check your spam or junk mail box if it's been a few minutes since you've ordered). Licenses are valid continuously for the specified number of months from the date of purchase. If you would like to pay by purchase order or corporate check, please contact us
before selecting your license.
If you would like to discuss user packages greater than those listed, including institutional packages and enterprise services, please contact us