Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7574500 | Establishing a cache expiration time to be associated with newly generated output by determining module- specific cache expiration times for a plurality of processing modules Providing an input-dependent output is disclosed. A received message is processed to determine if a previously cached output exists for the received message. If a previously cached output is found, the previously cached output is provided to a destination other than... | 08/11/2009 |
| 7043753 | Providing security for external access to a protected computer network A system and method are disclosed for providing controlled access via an external network to a resource residing on an internal network. An external request addressed to a first computer system associated with the internal network is received at the first computer s... | 05/09/2006 |
| 6845452 | Providing security for external access to a protected computer network A system and method are disclosed for providing controlled access via an external network to a resource residing on an internal network. An external request addressed to a first computer system associated with the internal network is received at the first computer s... | 01/18/2005 |
