1.1. These are countries where outcomes related to healthcare, education, life expectancy are less than other countries. We usually measure with the Human Development Index.
1.2. Examples include some Asian countries such as Cambodia, Phillipines, Myanmar
2. Indicators of Development
2.1. Healthcare
2.2. Education
3. MEDCs More Economically Developed Countries
4. Millenium Development Goals - these aim to improve the outcomes of the bottom billion. They cover a wide range of topics, but the progress towards them has been varied.