> In economics, a public good (also referred to as a social good or collective good)[1] is a good that is both non-excludable and non-rivalrous. For such goods,

> In economics, a public good (also referred to as a social good or collective good)[1] is a good that is both non-excludable and non-rivalrous. For such goods, users cannot be barred from accessing or using them for failing to pay for them. Also, use by one person neither prevents access of other people nor does it reduce availability to others. Any free open source product qualifies as a public good. It is free for all to use, and one person using it does not exclude anyone else from using.