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Appendix BStandard Acronyms
| ACD | automatic call distributor |
| AES | Advanced Encryption Standard |
| ALE | annual loss expectancy |
| ANSI | American National Standards Institute |
| AO | authorizing official |
| AP | access point |
| API | application programming interface |
| APT | advanced persistent threat |
| ARO | annual rate of occurrence |
| ATM | asynchronous transfer mode |
| AUP | acceptable use policy |
| AV | antivirus |
| B2B | business to business |
| B2C | business to consumer |
| BBB | Better Business Bureau |
| BC | business continuity |
| BCP | business continuity plan |
| BGP4 | Border Gateway Protocol 4 for IPv4 |
| BIA | business impact analysis |
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