Singleton?

[translore]

I have heard this term used in programming and I would like to know what it is exactly? First of all is it a common concept/term used in C++? Can someone also give me an example of a singleton??

[helios]

http://en.wikipedia.org/wiki/Singleton_pattern

In a nutshell, it's a design pattern (a concept in software development) for a class that allows only one instance of itself.