A<unk>  is a<unk>  within the project or to a sister project which is labeled differently from the name of the page it<unk> s to. This allows<unk> ing a word or phrase within the text of a page rather than using "see also", even if the wording does not exactly correspond with the name of the other page. With a suitable browser and depending on the preferences set, one can still see what page is<unk> ed to: when you point at the<unk> , the name shows up in a hover box and is also shown in the status bar.
For instance:
will show: How to set up a coffee house
The term<unk>  refers to the use of the<unk> character "|" used to separate the good description from the actual<unk> . This character is named after an alternative use of it; see<unk> (computing).
Another example would be [[train station|station]] rendering as station. This is useful where the word "station" is used in an article on trains; from the context, it would be clear that a train station is meant. The<unk>  is more convenient to the user than a<unk>  to station which is a disambiguation page.
Piped link
Bandage
Wonder 
Heave
Sponge
Quench
Fair coin
Burial