From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.4.5 404 Not Found
The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.
If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.
A radio transmission technology that attempts to avoid interference and block snooping by varying the frequency used by the transmission. It was co-invented by actress Hedy Lamarr.
Spread spectrum in general was originally used by the military. For today's wireless communications in an unlicensed radio frequency band, FCC regulations require the use of a spread spectrum technology. The choice is direct sequence spread spectrum (used by 802.11b systems) or frequency hopping spread spectrum (used by HomeRF and Bluetooth).
