MPS Directorate for Mathematical & Physical Sciences     CISE Directorate for Computer & Information Science & Engineering
AST Astronomical Sciences     CCF Computer and Communication Foundations
CHE Chemistry     CNS Computer and Network Systems
DMR Materials Research     EIA Experimental & Integrative Activities
DMS Mathematical Sciences     IIS Information & Intelligent Systems
PHY Physics     BIO Directorate for Biological Sciences
EHR Directorate for Education & Human Resources     DBI Biological Infrastructure
DGE Graduate Education     DEB Environmental Biology
DRL Research on Learning in Formal and Informal Settings     EF Emerging Frontiers
DUE Undergraduate Education     IOS Integrative Organismal Systems
ESR Educational System Reform     MCB Molecular and Cellular Biosciences
HRD Human Resource Development     OPP Office of Polar Programs
GEO Directorate for Geosciences     AIL Antarctic Infrastructure & Logistics Division
ATM Atmospheric Sciences     ANT Antarctic Sciences Division
EAR Earth Sciences     ARC Arctic Sciences Division
OCE Ocean Sciences     SBE Directorate for Social, Behavioral & Economic Sciences
ENG Directorate for Engineering     BCS Behavioral and Cognitive Sciences
CBET Chemical, Bioengineering, Environmental, and Transport Systems     SES Social and Economic Sciences
CMMI Civil, Mechanical, and Manufacturing Innovation     SRS Science Resources Statistics
ECCS Electrical, Communications and Cyber Systems     OD Office of the Director
EEC Engineering Education and Centers     OCI Office of CyberInfrastructure
IIP Industrial Innovation and Partnerships