### system:

Electric system
* are made of electric cables that are laid underneath the floor
  - subject to disturbances that cause momentary or extended power outages
* depend heavily on uninterrupted voice and data communications.
* transform all their energy into heat.
* use power only as needed.
+ Radiant heating, Types of Radiant Heating, Underfloor heating, Electric systems: Construction :: Heat
  * Electric systems are made of electric cables that are laid underneath the floor. Electricity is then used to heat the cables, and this type of system can be turned on or off much faster than a hot water system. However, these systems are often more expensive than hot water systems because of the high prices of electricity, especially if the hot water system includes the use of solar thermal energy. The high cost of an electric heating system can be reduced if the floor can be set to heat during non-peak hours, such as late at night, and is left turned off during the day. Electric systems are also less environmentally friendly because electricity is usually produced by burning fossil fuels, which increases carbon emissions.

Electronic network
* allay feelings of helplessness and embarrassment.
* are widely available for the transfer of data.
* form the backbone of the new economy, information the commodity
  - basis for shared knowledge and become powerful learning forums
* hold the promise of rapid availability of data.
* organize large amounts of data for access through a single source.

### system | electronic network:

Computer network
* Most computer networks can set up an account and a password over the telephone.
* allow information to flow more freely, with fewer obstructions
  - people to interact with many computers
* are almost the direct opposite
  - communications systems
  - critical parts of almost every organization
  - elaborate technologies for exchanging data between individual computers
  - everywhere
  - extensions of human networks
  - extremely diverse, users receive data via phone, cable, satellite or wireless
* are increasingly critical to an efficient and effective work environment
  - susceptible to hackers and cyber-criminals
  - more than a mere infrastructure for the transportation of data
  - one tangible form of interconnectedness
  - physical systems
  - products developed chips from the basic ideas of physics
  - the pivotal technology of the new era
  - very complex systems, with many levels of organization
  - vitally important for sharing resources and for communication purposes
* become as fundamental to urban life as street systems.
* bring people together who'd otherwise never meet.
* can be seductive places to work, play and communicate
  - help viruses spread rapidly to all computers on the network
* change the economics of business organization
  - power structure
* come in many different shapes and sizes.
* connect computers and peripheral equipment so that information can be shared
  - management with staff and even clients
* enable computers to talk to one another
  - people on different computers to share information and resources
* have information and code sloshing around in ways that are much harder to audit
  - the potential to facillitate community-supported constructionist learning
* is an electronic network
* link people and their ideas in new ways without virtually any effort or even cost.
* provide a quick and efficient means of exchanging information.
* range from local area networks to international computer networks.
* serve as another type of library.
+ Ambient intelligence, Requirements
  * Computer networks are easy to control and program. New devices in the networks should configure themselves automatically, or their configuration should be easy to do, without the need to understand the how they all work.