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)
- 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)
  Dean / Deputy Dean (OKZ: 5501)
  
  Faculty Management (OKZ: 5502)
  
  Administrative Bodies and Committees (OKZ: 5503)
  
  Department of Archaeology (OKZ: 5511)
  
  Department of Asian and African Studies (OKZ: 5512)
  
  Department of Education Studies (OKZ: 5513)
  
  Department of Cultural History and Theory (OKZ: 5514)
  
  Department of Art and Visual History (OKZ: 5515)
  
  Department of Musicology and Media Studies (OKZ: 5516)
  
  Department of Rehabilitation Sciences (OKZ: 5517)
  
  Head of Department (OKZ: 551701)
  
  General and Applied Rehabilitation Sciences / Chairs (OKZ: 551710)
  
  Psychology of Rehabilitation (OKZ: 551715)
  
  Sociology of Rehabilitation and Professional Rehabilitation (OKZ: 551716)
  
  Rehabilitation Technology and New Media (OKZ: 551717)
  
  Sign Language Interpreting (OKZ: 551718)
  
  Interpreting Language of Gestures (OKZ: 551719)
  
  Sections in Rehabilitational Education Studies / Chairs (OKZ: 551720)
  
  Senior Professor and Professors retired (OKZ: 551797)
  
  Department of Social Sciences (OKZ: 5518)
  
  Department of Sports Sciences (OKZ: 5519)
  
  additional Scientific Units (OKZ: 5580)
- 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)