Humboldt University (OKZ: 00)
- President / Vice-Presidents (OKZ: 0100)
- University Administration (OKZ: 02)
- Administrative Bodies and Committees (OKZ: 03)
- Faculty of Law (OKZ: 10)
- Faculty of Life Sciences (OKZ: 21)
  Dean / Deputy Dean (OKZ: 2101)
  
  Administrative Bodies and Committees (OKZ: 2103)
  
  Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences (OKZ: 2111)
  
  Department of Biology (OKZ: 2112)
  
  Department of Psychology (OKZ: 2113)
  
  additional Scientific Units (OKZ: 2180)
  
  Institutes "within" the Humboldt Universität zu Berlin and Non-affiliated Units (OKZ: 2199)
  
  Institutes "within" the Humboldt Universität zu Berlin (OKZ: 219910)
  
  Institute for Agricultural and Urban Ecology Projects within the Humboldt Universität zu Berlin (OKZ: 219912)
- Faculty of Mathematics and Natural Sciences (OKZ: 33)
- Faculty of Humanities (OKZ: 51)
- Faculty of Language, Literature and Humanities (OKZ: 52)
- Faculty of Humanities and Social Sciences (OKZ: 55)
- Faculty of Theology (OKZ: 60)
- Faculty of Economics and Business Administration (OKZ: 70)
- Center for the Science of Materials Berlin (OKZ: 81)
- Centre for British Studies (OKZ: 82)
- Central Institute Professional School of Education (OKZ: 83)
- Hermann von Helmholtz-Centre for Cultural Techniques (OKZ: 84)
- Integrative Research Institutes (OKZ: 85)
- Excellency Cluster (OKZ: 86)
- Humboldt Graduate School (OKZ: 87)
- Interdisciplinary Research Centres (OKZ: 88)
- Other Interdisciplinary Units (OKZ: 89)
- Central Unit - Language Centre (OKZ: 91)
- Central Unit - University Library (OKZ: 92)
- Central Unit - Computer and Media Service (OKZ: 93)
- Central Unit - Sport and Recreation (OKZ: 94)
- additional Central Institutes (OKZ: 96)
- Institutes "within" the Humboldt-Universität zu Berlin and Non-affiliated Units (OKZ: 99)