- Vacuum tube (Wikipedia)
A vacuum tube, electron tube, thermionic valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. It takes the form of an evacuated tubular envelope of glass or sometimes metal containing electrodes connected to external connection pins.
- Sandy River (Oregon) (Wikipedia)
The Sandy River is a 56-mile (90 km) tributary of the Columbia River in northwestern Oregon in the United States. The Sandy joins the Columbia about 14 miles (23 km) upstream of Portland.