In 1991 the American Psychiatric Association proposed a draft version of the IV edition of the Diagnostic and Statistical Manual of Mental Disorders--the DSM IV Options Book. Authors of this version wanted to increase clarity of the criteria sets and to provide compatibility with the Tenth Edition of the International Classification of Diseases (ICD - 10). The purpose of this Options Book is to propose some changes in wording, diagnostic divisions and to discuss various options concerning the placement of sections and disorders within the classification. The "Disorders of Infancy, Childhood or Adolescence" section was renamed "Disorders Usually First Evident in Infancy, Childhood or Adolescence" and moved to the front of the classification and also was expended to 11 groups of disorders. Several suggestions have been made about including new diagnostic groupings such as: Rett's Disorder, Eating Disorders and Voice Disorder. The Options Book introduces a superior category for Attention Deficit Disorders (with and without hyperactivity) and for Conduct Disorder/Oppositional Defiant Disorder. Several options are proposed regarding The Anxiety Disorders of Childhood or Adolescence. There is no evidence for a distinction in this category according to the age criterion. One option would be to move these disorders into the adult anxiety section (similarly as in the Mood Disorders and Schizophrenia). In the new version the title "Specific Developmental Disorders" is omitted. The suggestion is to include Phonological Disorder (Articulation Disorders) and Elective Mutism into Speech and Language Disorders section.