Students may find it helpful to make the crosswalk between the international system and the American system. ICD-10 continues to use the term "organic mental disorders" (F0 and F1), F1 encompassing psychoactive substance abuse disorders. DSM-IV has stopped using the word "organic" (presumably all disease has biological correlates) and, instead, uses descriptive categories: deliriums, dementias, amnesic disorders, mental disorder due to a general medical condition, and substance-related disorders. ICD-10 F2 and F3 are grouped as psychotic mental disorders (schizophrenia and mood disorders), although many of the examples are without psychotic features. Why is something a psychotic disorder if only some of the cases, some of the time, exhibit psychosis? Incidentally, what is psychosis? The ICD-10 F4, F5, and F6 categories cover "neurotic, stress, and personality disorders." DSM-IV calls these anxiety, somatoform, factitious, dissociative, sexual and gender identity, eating, impulse control, and personality disorders, having dispensed with the meaningless word "neurotic." Perhaps, soon, the equally meaningless word "personality" will yield to more understandable descriptors.