# Appendix
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**Topics**
+ [Appendix: SelectObjectContent Response](RESTSelectObjectAppendix.md)
+ [Appendix: OPTIONS object](RESTOPTIONSobject.md)
+ [Appendix: SOAP API](APISoap.md)
+ [Appendix: Authenticating requests (Amazon signature version 2)](Appendix-Sigv2.md)
+ [Appendix: Lifecycle Configuration APIs (Deprecated)](lifecycle-old-api.md)