Legal drinking age. The legal drinking age is the age at which a person can legally consume or purchase alcoholic beverages. These laws cover a wide range of issues and behaviors, addressing when and where alcohol can be consumed.
An open system is a system that has external interactions. Such interactions can take the form of information, energy, or material transfers into or out of the system boundary, depending on the discipline which defines the concept.
The Definition. An open software service is one: Whose data is open as defined by the Open Definition with the exception that where the data is personal in nature the data need only be made available to the user (i.e. the owner of that account).