browser error codes vs. system error codes

[CocoaB]

Are browser error numbers the same as system error numbers? Or do they have a completely separate series of error codes that they use?

[suwunk]

An HTTP status code is not the same as a Device Manager error code or a system error code. Some system error codes share code numbers with HTTP status codes but they are different errors with completely different associated error messages and meanings.
System Error Codes (http://msdn.microsoft.com/en-us/library/windows/desktop/ms681381%28v=vs.85%29.aspx)
Status codes in HTTP (http://www.w3.org/Protocols/HTTP/HTRESP.html)