The property or an instance of being concurrent; something that happens at the same time as something else.
A property of systems where several processes execute at the same time.
A stretch of road that is shared between two or more numbered or named routes.
The occurrence of two different or opposing things in the same time and place.
A close, prolonged association between two or more organisms of different species, regardless of benefit to the members.
A close, prolonged association between two or more organisms of different species that normally benefits both members. An interspecies cooperation.
The state of people of different types, races, cultures, communities, etc., living together.
A relationship of mutual benefit, especially among different species.