A CMOS battery--short for complementary metal oxide semiconductor--is necessary to retain your computer's hardware settings. Symptoms of a dying CMOS battery include system warnings, lost time settings, and sometimes even unexpected shutdowns. Once you've recognized the symptoms, you can check the battery itself.
A non-governmental organization (NGO) is a citizen-based association that operates independently of government, usually to deliver resources or serve some social or political purpose.
The World Bank classifies NGOs as either operational NGOs, which are primarily concerned with development projects, or advocacy NGOs, which are primarily concerned with promoting a cause. The International Standards Organization (ISO) is a non-governmental organization.