| ACEV | Mother Child Education Foundation |
| ACF | Albanian Children’s Foundation |
| ASQ | Ages and Stages Questionnaire |
| ASQ: I | Ages and Stages Questionnaire: Inventory |
| CDC | U.S. Centers for Disease Control and Prevention |
| CEE/CIS | Central and Eastern Europe and the Commonwealth of Independent States |
| ECI | early childhood intervention |
| GMCD | Guide for Monitoring Child Development |
| HIV | human immunodeficiency virus |
| IDELA | International Development and Early Learning Assessment |
| IQ | intelligence quotient |
| ISSA | International Step by Step Association |
| iYCG Forum | Forum on Investing in Young Children Globally |
| MDG | Millennium Development Goal |
| NGO | nongovernmental organization |
| RECI | Roma Early Childhood Inclusion |
| SEAN | South European Autism Network |
| THRIVES | Training, Household, Reduce, Improve, Value, Educate, Surveillance |
| UN CRC | United Nations Convention on the Rights of the Child |
| UN CRPD | United Nations Convention on the Rights of Persons with Disabilities |
| UN SDG | United Nations Sustainable Development Goal |
| UNDP | United Nations Development Programme |
| UNESCO | United Nations Educational, Scientific and Cultural Organization |
| UNHCR | United Nations High Commissioner for Refugees |
| UNICEF | United Nations Children’s Fund |
| VACS | Violence Against Children Surveys |
| WHO | World Health Organization |