If remembering the difference between a renewal and a revision has you stumped, we have a page on types of applications that can help. Knowing what type of application you are submitting is important for a number of reasons. The type determines the rules we enforce for submission, the due date, even whether you are allowed to submit to a specific funding opportunity announcement (see section II of the FOA under “Application Types Allowed”). You may have noticed that the type also determines the first digit in the application number. Follow the links from the Types of Applications page to learn about requirements for competing revisions, administrative supplements, even resubmissions.