Age Groups

NLM has two schedules devoted to specific age groups:

• WS Pediatrics
• WT Geriatrics

Some subjects have specific classification numbers for particular age groups.

WS Pediatrics

Classify in the WS schedule works on diseases of specific body systems in children (includes adolescents), as well as works on diseases limited to the newborn or premature infant unless there are specific instructions to the contrary. Classify works on specific diseases in children with the disease (e.g., pneumonia in infants in WC 202; schizophrenia in childhood in WM 203, etc.) unless there are specific instructions to the contrary. Classify works on other topics dealing with children with the topic unless there are specific instructions to the contrary.

Other Specific Classification Numbers for Children

Class Number	Caption
QZ 275	Pediatric oncology. Adolescent oncology (General)
WN 240	Pediatric diagnostic imaging
WO 440	Pediatric anesthesia
WO 925	Pediatric surgery
WU 113.6	[Oral health and hygiene] Works for and about children
WU 480	Pediatric dentistry. Dental care for children
WW 600	Pediatric ophthalmology and optometry

WT Geriatrics

Classify general works on the aged (65 and above) in the WT schedule. Classify works on specific diseases of the aged with the disease unless there are specific instructions to the contrary. Classify works on other topics dealing with the aged with the topic unless there are specific instructions to the contrary.

Other Specific Classification Numbers for the Aged

Class Number	Caption
WO 445	Geriatric anesthesia
WO 950	Geriatric surgery
WU 490	Geriatric dentistry. Dental care for the aged
WW 620	Geriatric ophthalmology and optometry