Levels of classification over Top Secret:
- Sensitive Compartmented Information" (SCI)
- SCIF data or information that can only be read inside of a Special Compartmentalized Information Facility.
- Special Access Programs (SAP)
- SCI Access" or SAP approval
In the military, all classified information is divided into one of three categories:
CONFIDENTIAL: Applied to information or material the unauthorized disclosure of which could be reasonably expected to cause damage to the national security.
SECRET: Applied to information or material the unauthorized disclosure of which reasonably could be expected to cause serious damage to the nation
al security.TOP SECRET: Applied to information or material the unauthorized disclosure of which reasonably could be expected to cause exceptionally grave damage to the national security.
ref: http://usmilitary.about.com/cs/generalinfo/a/security.htm