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.
  An operating system is a software which is used to manage or open all the softwares in the computer/device ANS2:A computer's operating system is a set of programs that c â¦ ontrols the hardware.It is certainly software even if it happens to be in some non-writeable storage such as an e-prom. An operating system is a software which is used to manage or open all the softwares in the computer/device ANS2:A computer's operating system is a set of programs that c â¦ ontrols the hardware.