### device:

Cable
* Most cables conduct power.
* Most cables have a central conductor, a wire, surrounded by a plastic jacket
  - conductors
* Some cables contain both electrical wires and optical fibers.
  * A 'cable' is made of many wires or optical fibers twisted together to make a larger wire. Each of these wires may be covered. Some cables contain both electrical wires and optical fibers. There are many kinds of cables, including coaxial cables which block out radio or magnetic interference from other wires or cables, by having one wire inside an insulated tube surrounded by a second wire, acting as a metal tube along the same axis. Wire ropes are a common type of cable.
* are conductors
  - connectors attached to wires
  - cord
* are located in computers
  - desks
  - electrical devices
  - substations
  - television
* are part of cables
  - suspension bridges
  - the veins of a computer network
  - used for transmitting information
* factory assembly of two or more conductors having an overall covering or jacket.
* form of communications.
* have conductors
  - insulation
  - neutral wire
* is insulated wire, and is used in a form called twisted pair
  - telegram
  - the medium through which information usually moves from one network device to another
* make use of the tensile strength of steel, and can support incredible forces for their size.
* obey the laws of physics.
* provide features.
* pulling lubricant critical component in properly engineered cable systems.
* shared medium that is subject to eavesdropping and service theft.
* support weight.

### device | cable:

Digital cable
* allows cable television signals to be compressed, allowing more channels.
* compresses television signals to allow many more channels.

Electric cable
* Some electric cables contain neutral wire
* are an accident just waiting to happen to a hamster.
* create a magnetic field.

Fiber cable
* are substantially lighter in weight and occupy much less volume than copper cables.
* is lightweight, much lighter than copper conductor cable.

Optical cable
* allow enormous volumes of data to be transported as light, virtually without losses.
* is used to transmit all data to the computer.
* transmit data using pulses of laser light.
* use SC or duplex SC connectors.

### device:

Catalytic converter
* are converters
  - fickle at best
  - however less effective in Diesels compared with gasoline engines
  - located in the exhaust system to remove NOx emissions
  - now a standard part of a car's exhaust system
* can generate temperatures high enough to ignite surrounding materials
  - start grass fires
* change harmful pollutants in the exhaust into harmless gases.
* operate at several hundred degrees.
* tend to increase emissions of nitrous oxide.
* treat exhaust gases to remove nitrous oxides.

### device:

Catapult
* are artillery units capable of launching heavy boulders
  - slow and have little armor but can destroy almost anything from about twenty feet
* hurl lightweight projectiles very far and very fast.
* use weights and levers to send the rocks or other things into the air
  * A 'catapult' type of machine used as a weapon to shoot rocks or other things that would cause damage to something else. Catapults use weights and levers to send the rocks or other things into the air. They are simpler than other modern weapons and not useful in modern warfare. Catapults were common in the past, especially the Middle Ages