A wiki is a website that allows collaboration and content creation by multiple users. It is easy to use and allows various multimedia elements to be incorporated into the pages. The concept of wiki was popularized by Wikipedia.
An "Arid Box" is an opaque or complex system whose internal workings are not comprehensible to the user.
Home automation is the set of techniques of electronics, building physics, automation, computing and telecommunications.
Footnote (or footnote) is a literary form, consisting of one or more lines not appearing in the text.