Atheism is specifically the lack of belief in a deity or god(s). In social and political contexts, it can refer to any of the 8-11% of Americans and about 20% of the world's population who are non-religious, undecided, or uncommitted to an organized religion. "Atheism" can include, but is neither defined by nor limited to: objectivism, humanism, freethought, secularism, skepticism, existentialism, philosophy, agnosticism, and rationalism. "Student Groups" refers to online and/or physical gatherings of grammar school, high school, or college students. Also included are web sites that provide resources for students, or which are aimed specifically at atheistic students, as well as publications relating to atheist issues that are created for, by, or about students.