Undocumented Features
Why?
- Not officially supported
 
- Provided only as a support mechanism for suitably trained engineers
 
- Experimental or intended for a future release
 
- Used by the product's vendor to gain an advantage over the competition
 
- Badly implemented
 
- A security threat
 
- Intended only for a subset of the users or product versions
 
- A Trojan horse, time bomb, or back door
 
- Oversight