A team is a group of people working on a common goal. It describes an organizational unit, that has an average maximum size of twelve members. Teams with more than twelve members tend to become unproductive, because the communication overhead nessessary to keep the social structure working extends the benefit of division of labor and combination of skills in a team.
Teams of knowledge workers are not bound to a specific working time or place, as collaboration software allows them to work distributedly and asynchronously.
A social collaboration pattern that depends on the existance of teams is the project. Each project has a number of members, these are known as the project team.