| Part I: Triennial Report of ICO:: | 1 |
| Triennial Report of ICO to IUPAP | 2 |
| ICO admitted as ICSU International Scientific Associate | 10 |
| Member contributions | 12 |
| ICO Bureau Meetings minutes | 30 |
| Finances | 95 |
| Committee Reports and Awards: | 97 |
| ICO Nominating Committee | 97 |
| Travelling Lecturer Committee | 99 |
| ICO prize | 105 |
| ICO Galileo Galilei Award | 111 |
| ICO/ICTP Gallieno Denardo Award | 117 |
| Meetings and Schools with ICO Participation | 123 |
| Meeting Reports: | 131 |
| 2005-2006-2007-2008 | 131 |
| ICO/ICTP | 145 |
| Part II: Meetings Procedures:: | 169 |
| ICO Congress and Major Event information | 170 |
| ICO Consponsorship information | 175 |
| Steering Committees | 177 |
| Part III: The Organisation of ICO:: | 179 |
| Statutes | 180 |
| Rules and Codes of Practice | 185 |
| Membership | 201 |
| ICO Bureau and Committees | 210 |
| Previous ICO Bureaux | 216 |
| Part IV: The 2005 General Meeting :: | 221 |
| 2005 General Meeting minutes | 222 |
| Agenda of the 2008 General Meeting | 234 |
| Budget plan for 2008-2011 | 235 |
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