### device | filter:

Oil filter
* are auto parts
  - automotive products
  - easy to replace and help prevent unnecessary engine wear
  - usually on the side of the engine
* protect the lubrication of the engine.

Optical filter
* act on light.
* are also widely used to enhance sensitivity and reduce background fluorescence.
* consist mainly of colorants dissolved in gelatin.
* separate wavelengths of light using the principle of optical interference.
+ Filter, In optics and photography
  * Optical filters act on light. They change it certain ways. This can be used for photographic filters.

Packet filter
* allow a process to dictate which packets it's interested in.
* control the transmission of data based on information contained in the packet header.
* use routers to filter information coming to and from a network.
* work by dropping packets based on their source or destination addresses or ports.

Red filter
* pass red light and absorb cyan.
* tend to increase contrast between foliage and canopy openings.

Sand filter
* are the oldest and most common types of media filters.
* treat runoff from impervious areas such as parking lots.

Water filter
* are economical when compared to bottled water and much kinder to the earth
  - like sponges
* provide water filtration efficiency.

### device:

Fire extinguisher
* Fire Extinguishers can help insure that a fire can be put out before it grows out of control
  - prevent a small loss from turning into a large one
* Many fire extinguishers use foams.
* Some fire extinguishers contain bicarbonate of soda, treated to prevent caking.
* are an important fixture in the home
  - devices
* are for fire extinguishing only
  - safety
  - small fires only
  - the use of fire safety
  - trained personnel use only
* are located in boats
  - buildings
  - buses
  - chemistry labs
  - garages
  - hospitals
  - houses
  - kitchens
  - public buildings
  - school buses
  - stairwells
  - mechanical devices
  - normally red
  - of various types
  - the first line of defense against fire
  - to be used only to clear an exit way
  - typically the last line of defense when a fire suddenly appears
  - used for safety
* can only put out small, contained fires, such as a fire in a wastebasket
  - stop small fires from becoming large ones
* come in many sizes and types
  - with locks, aspirin with safety caps
* contain different chemicals, depending on the application.
* have seven parts
  - their limits
* last a long time.
* provide a weapon.
* require some routine care.
* using water foam, carbon dioxide or dry chemicals are all effective.
* work only if they are properly charged.

### device:

Flytrap
* Some flytraps produce flowers
  - white flowers
* are most effective where insects are routinely detained and given more time to respond
* can rot if constantly waterlogged in an un-drained container.
* grow well in the partial shade cast by the taller Sarracenia.
* includes decoys
  - sections
* is the first range of commercial insect killers to be designed around the glue board.
* love the sun and turn a beautiful golden tinge.
* spin when no creatures can be infected.
* thrive in a mix of one part sand to one part peat.

Gadget
* Most gadgets use energy.
* are everywhere, but it's how people use technology that changes lives
  - hacks to place load on the application side instead of on the server
* contain materials.
* help measure body fat, record heart rates, even keep track of blood pressure rates.
* includes sections.

### device | gadget:

Injector
* are appliances.
* usually inject into the muscles rather than a vein.

Gizmo
* are emails containing packets of media that can be saved to a user's desktop.
* come in all shapes and sizes.

### device | goad:

Gad
* are shy birds and are very adapt at blending into the local aquatic vegetaion.
* swim very high in the water and fly very swiftly.