Sub-categories 

1.  Paranoid schizophrenia: The people suffer from hallucinations and delusions.  They usually feel that someone or something is out to get them.  Treatment is important because without treatment them or someone else may be in danger.

2.  Catatonic schizophrenia:  The person is isolated, negative and very withdrawn.  They are known to hold odd postures for a very long time. 

3.  Schizo affective disorder:  Accompanied by a mood disorder.  Mixed mania, depression or even bipolar.

4.  Disorganized schizophrenia:  The people suffer from emotional responses, and their activities seem pointless. They are verbally incoherent and do things that are unproductive.

5. Residual schizophrenia:  The person is not suffering from any of the schizophrenia symptoms.  They do not have motivation or interest in day-to-day activities.

6.  Undifferentiated schizophrenia:  Do not fit in any of the sub categories.  A person may show signs of more than one of them without falling into a particular category.