The controversies around the American Psychiatric Association`s DSM-5 have cast a spotlight rather on diagnostic systems in Psychiatry. While we all eagerly await publication of the WHO`s new diagnostic manual – ICD-11 – I thought it worthwhile to quickly review ICD-10. Whereas DSM-IV and DSM-5 are expensive manuals to come by, the WHO publish ICD-10 online and it is available here on their website.