LDDB is a database of non-chromosomal multiple congenital anomaly syndromes. It is extrememly useful in diagnosis and helps in providing genetic counseling for rare syndromes associated with mental retardation and congenital anomalies. It contains information on over 3,000 syndromes and has over 28,000 references. System Requirements: Windows 95, 98SE, ME, Windows NT 4.0, Windows 2000. 32 MB RAM. 70 MB free hard disk space. VGA monitor set to 800x600 screen resolution in high color.