LIBRARY OF CONGRESS CYAC SUBJECT HEADINGS
TENTATIVE MONTHLY LIST 10 CYAC
The proposed headings on this list are NOT YET APPROVED and not yet available for use in current cataloging.
Send all comments on this list to the CYAC Program - Email: cyacprog@loc.gov
"(A)" indicates pre-approved proposals for material in Priority 1. "(C)" indicates proposals submitted by libraries in the Subject Authority Cooperative Program (SACO).
 
 
CHILDREN'S SUBJECT HEADINGS
 
150
Academic achievement    [Not Subd Geog]    [sp2021053190]
 
450
UF Academic underachievement DELETE FIELD
 
450
UF Achievement, Academic DELETE FIELD
 
450
UF Achievement, Scholastic DELETE FIELD
 
450
UF Achievement, Student DELETE FIELD
 
450
UF Performance, Academic DELETE FIELD
 
450
UF Progress, Academic DELETE FIELD
 
450
UF Scholastic success DELETE FIELD
 
450
UF School achievement DELETE FIELD
 
450
UF School success (Academic achievement) DELETE FIELD
 
450
UF Success, Academic DELETE FIELD
 
450
UF Success, School (Academic achievement) DELETE FIELD
 
450
UF Success, Scholastic DELETE FIELD
 
450
UF Underachievement, Academic DELETE FIELD
 
550
BT Performance DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Allegiance    [Not Subd Geog]    [sp2025050307]
 
053
JC328 (Political theory)
 
550
BT Loyalty
 
 
150
Bornean orangutans    [May Subd Geog]    [sp2025050323]
 
053
QL737.P94 (Zoology)
 
450
UF Bornean oragutan
 
450
UF Pongo pygmaeus
 
550
BT Orangutans
 
680
When this heading is assigned, the second subject heading Orangutans is also assigned, e.g., 1. Bornean orangutans. 2. Orangutans.
 
 
150
Brown rats    [May Subd Geog]    [sp2025050313]
 
053
QL737.R666 (Zoology)
 
450
UF Barn rats
 
450
UF Brown rat
 
450
UF Common rats
 
450
UF Norway rats
 
450
UF Rats, Norway
 
450
UF Rattus norvegicus
 
450
UF Sewer rats
 
450
UF Wharf rats
 
550
BT Mouse family (Mammals)
 
550
BT Rats
 
680
When this heading is assigned, the second subject heading Mouse family (Mammals) is also assigned, e.g., 1. Brown rats. 2. Mouse family (Mammals)
 
 
150
Collared lemmings    [May Subd Geog]    [sp2025050312]
 
053
QL737.R666 (Zoology)
 
450
UF Arctic collared lemmings
 
450
UF Arctic lemmings
 
450
UF Collared lemming
 
450
UF Dicrostonyx torquatus
 
450
UF Palearctic collared lemmings
 
550
BT Lemmings
 
550
BT Mouse family (Mammals)
 
680
When this heading is assigned, the second subject heading Mouse family (Mammals) is also assigned, e.g., 1. Collared lemmings. 2. Mouse family (Mammals)
 
 
150
Common sense DELETE GEOG    [sp2021060659]
 
550
BT Judgment DELETE FIELD
 
550
BT Knowledge, Theory of DELETE FIELD
 
550
BT Prudence DELETE FIELD
 
550
BT Reason DELETE FIELD
 
550
BT Wisdom ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Commonality    [Not Subd Geog]    [sp2025050306]
(A)
450
UF Similarity
 
550
BT Philosophy
 
550
BT Psychology
 
 
150
Convulsions    [May Subd Geog] CHANGE GEOG    [sp2021061110]
 
053
RC394.C77 DELETE FIELD
 
053
RC394.C77 (Internal medicine) ADD FIELD
 
450
UF Convulsive disorders DELETE FIELD
 
450
UF Convulsive seizures DELETE FIELD
 
450
UF Seizures, Convulsive DELETE FIELD
 
550
BT Nervous system--Diseases DELETE FIELD
 
550
RT Epilepsy DELETE FIELD
 
550
RT Spasms DELETE FIELD
 
550
BT Symptoms ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Exocrine glands    [Not Subd Geog]    [sp2025050197]
 
053
QP187.7 (Physiology)
 
550
BT Glands
 
 
150
Mammary glands    [May Subd Geog] CHANGE GEOG    [sp2021053113]
 
053
QL944 (Comparative anatomy) DELETE FIELD
 
053
QL944 (Zoology) ADD FIELD
 
550
BT Udder DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Salivary glands    [Not Subd Geog]    [sp2021060657]
 
053
QL865 (Comparative anatomy) DELETE FIELD
 
053
QL865 (Zoology) ADD FIELD
 
450
UF Demilunes of Heidenhain DELETE FIELD
 
450
UF Giannuzzi's semilunar bodies DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Exocrine secretions    [May Subd Geog]    [sp2025050250]
 
450
UF Exocrine gland secretions
 
450
UF Exocrine glands--Secretions
 
550
BT Secretion
 
 
150
Earwax    [May Subd Geog] CHANGE GEOG    [sp2021059222]
 
550
BT Ear--Secretions DELETE FIELD
 
550
BT Waxes DELETE FIELD
 
550
BT Exocrine secretions ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Milk    [May Subd Geog] CHANGE GEOG    [sp2021051045]
 
053
SF251-SF262 DELETE FIELD
 
053
SF251-SF262.5 (Animal culture) ADD FIELD
 
550
BT Exocrine glands--Secretions DELETE FIELD
 
550
BT Body fluids ADD FIELD
 
550
BT Exocrine secretions ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
681
Example under Food DELETE FIELD
 
 
150
Mucus    [May Subd Geog] CHANGE GEOG    [sp2021056632]
 
053
QP215 DELETE FIELD
 
053
QP215 (Physiology) ADD FIELD
 
450
UF Phlegm ADD FIELD
 
550
BT Exocrine glands--Secretions DELETE FIELD
 
550
BT Exocrine secretions ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Saliva    [Not Subd Geog]    [sp2021060573]
 
053
QP191 DELETE FIELD
 
053
QP191 (Physiology) ADD FIELD
 
450
UF Salivary secretion ADD FIELD
 
550
BT Exocrine glands--Secretions DELETE FIELD
 
550
BT Parotid glands DELETE FIELD
 
550
RT Drooling DELETE FIELD
 
550
RT Sputum DELETE FIELD
 
550
BT Exocrine secretions ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Perspiration CHANGE HEADING
 
150
Sweat    [May Subd Geog] CHANGE GEOG    [sp2021060680]
 
053
QP221 (Physiology)
 
450
UF Perspiration [Former heading]
 
550
BT Body fluids
 
550
BT Excretion
 
550
BT Exocrine secretions
 
688
Heading changed from Perspiration to Sweat in October 2025.
 
 
150
Tears    [May Subd Geog] CHANGE GEOG    [sp2021056202]
 
053
QP231 DELETE FIELD
 
053
QP231 (Physiology) ADD FIELD
 
450
UF Lacrimal apparatus--Secretions DELETE FIELD
 
550
BT Exocrine secretions ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Golden lion tamarins    [May Subd Geog]    [sp2025050320]
 
053
QL737.P925 (Zoology)
 
450
UF Golden lion tamarin
 
450
UF Leontideus rosalia
 
450
UF Leontopithecus rosalia
 
550
BT Marmoset family (Mammals)
 
550
BT Rain forest animals
 
550
BT Tamarins
 
680
When this heading is assigned, the second subject heading Marmoset family (Mammals) is also assigned, e.g., 1. Golden lion tamarins. 2. Marmoset family (Mammals)
 
 
150
Harvest mice    [May Subd Geog]    [sp2025050314]
 
053
QL737.R666 (Zoology)
 
450
UF Harvest mouse
 
550
BT Mice
 
550
BT Mouse family (Mammals)
 
 
150
American harvest mice    [May Subd Geog]    [sp2025050315]
 
053
QL737.R666 (Zoology)
 
450
UF American harvest mouse
 
450
UF Reithrodontomys
 
550
BT Harvest mice
 
550
BT Mouse family (Mammals)
 
 
150
Eurasian harvest mice    [May Subd Geog]    [sp 96005643 ]
 
550
BT Mice DELETE FIELD
 
550
BT Harvest mice ADD FIELD
 
 
150
Honesty    [Not Subd Geog] ADD GEOG    [sp 96005687 ]
 
053
BF723.H7 (Psychology) ADD FIELD
 
053
BJ1533.H7 (Ethics) ADD FIELD
 
450
UF Dishonesty ADD FIELD
 
450
UF Falsehood and truthfulness ADD FIELD
 
550
BT Ethics ADD FIELD
 
 
150
Hungry Ghost Festival    [May Subd Geog]    [sp2021057936]
 
550
BT Taoist fasts and feasts ADD FIELD
 
550
BT Taoist memorial rites and ceremonies ADD FIELD
 
 
150
Integrity    [Not Subd Geog]    [sp2021056159]
 
053
BJ1533.I58 (Ethics) ADD FIELD
 
550
RT Honesty DELETE FIELD
 
550
BT Ethics ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Jain fasts and feasts    [May Subd Geog]    [sp2025050303]
 
450
UF Fasts and feasts--Jainism
 
450
UF Feasts and fasts--Jainism
 
450
UF Jain feasts and fasts
 
450
UF Jain festivals
 
450
UF Jain holidays
 
450
UF Parvan
 
550
BT Fasts and feasts
 
 
150
Jerboas    [May Subd Geog]    [sp2025050316]
 
053
QL737.R648 (Zoology)
 
550
BT Burrowing animals
 
550
BT Nocturnal animals
 
550
BT Rodents
 
 
150
Mandrills    [May Subd Geog]    [sp2025050317]
 
053
QL737.P93 (Zoology)
 
450
UF Mandrill
 
450
UF Mandrillus sphinx
 
450
UF Simia sphinx
 
550
BT Old World monkeys
 
550
BT Rain forest animals
 
680
When this heading is assigned, the second subject heading Old World monkeys is also assigned, e.g., 1. Mandrills. 2. Old World monkeys.
 
 
150
Mortgage loans    [May Subd Geog]    [sp2025050305]
(A)
550
BT Loans
 
 
150
Muscular system CHANGE HEADING
 
150
Musculoskeletal system    [May Subd Geog] ADD GEOG    [sp 96005974 ]
 
053
QL821-QL831 (Zoology)
 
053
QM100-QM170 (Human anatomy)
 
053
QP301-QP336 (Physiology)
 
450
UF Locomotor system
 
450
UF Muscular system [Former heading]
 
450
UF Skeletal system
 
450
UF Skeletomuscular system
 
550
BT Anatomy
 
688
Heading changed from Muscular system to Musculoskeletal system in October 2025.
 
 
150
Orderliness    [Not Subd Geog] ADD GEOG    [sp 96005998 ]
 
053
BJ1533.O73 (Ethics) ADD FIELD
 
450
UF Messiness DELETE FIELD
 
450
UF Untidiness DELETE FIELD
 
450
UF Regularity ADD FIELD
 
450
UF Uniformity ADD FIELD
 
550
BT Conduct of life ADD FIELD
 
 
150
Preparedness    [Not Subd Geog]    [sp2021054252]
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Proboscis monkeys    [May Subd Geog]    [sp2025050318]
 
053
QL737.P93 (Zoology)
 
450
UF Nasalis larvatus
 
450
UF Proboscis monkey
 
550
BT Forest animals
 
550
BT Old World monkeys
 
680
When this heading is assigned, the second subject heading Old World monkeys is also assigned, e.g., 1. Proboscis monkeys. 2. Old World monkeys.
 
 
150
Prudence    [Not Subd Geog]    [sp2021058690]
 
053
BJ1533.P9 DELETE FIELD
 
053
BJ1533.P9 (Ethics) ADD FIELD
 
550
RT Discretion DELETE FIELD
 
550
RT Tact DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Pygmy marmosets    [May Subd Geog]    [sp2025050319]
 
053
QL737.P925 (Zoology)
 
450
UF Cebuella
 
550
BT Marmoset family (Mammals)
 
550
BT Marmosets
 
550
BT Rain forest animals
 
 
150
Reliability    [Not Subd Geog]    [sp2021053989]
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Respect    [Not Subd Geog]    [sp2021056422]
 
053
BJ1533.R4 DELETE FIELD
 
053
BJ1533.R4 (Ethics) ADD FIELD
 
450
UF Regard ADD FIELD
 
450
UF Reverence ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Seizures (Internal medicine)    [May Subd Geog]    [sp2025050308]
 
550
BT Symptoms
 
 
150
Selfishness    [Not Subd Geog] ADD GEOG    [sp 96006096 ]
 
053
BJ1535.S4 (Ethics) ADD FIELD
 
 
150
Sharing    [Not Subd Geog]    [sp2021051192]
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Sikh fasts and feasts    [May Subd Geog]    [sp2025050304]
 
450
UF Fasts and feasts--Sikhism
 
450
UF Feasts and fasts--Sikhism
 
450
UF Sikh feasts and fasts
 
450
UF Sikh festivals
 
450
UF Sikh holidays
 
550
BT Fasts and feasts
 
 
150
Baisakhi    [May Subd Geog]    [sp2024050424]
 
550
BT Sikh fasts and feasts ADD FIELD
 
 
150
Simplicity    [Not Subd Geog]    [sp2021053429]
 
053
BJ1496 DELETE FIELD
 
053
B105.S55 (Philosophy) ADD FIELD
 
053
BJ1496 (Ethics) ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Sincerity    [Not Subd Geog]    [sp2021054323]
 
053
BJ1533.S55 (Ethics) ADD FIELD
 
550
RT Honesty DELETE FIELD
 
550
BT Conduct of life ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Sportsmanship    [Not Subd Geog]    [sp2021051150]
 
053
GV706.3 DELETE FIELD
 
053
GV706.3 (Recreation) ADD FIELD
 
550
BT Sports--Philosophy DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Success    [Not Subd Geog]    [sp2021051240]
 
450
UF Growth (Psychology) DELETE FIELD
 
450
UF Personal development DELETE FIELD
 
450
UF Personal growth DELETE FIELD
 
450
UF Self-improvement DELETE FIELD
 
450
UF Achievement ADD FIELD
 
450
UF Accomplishment ADD FIELD
 
550
BT Conduct of life DELETE FIELD
 
550
BT Fortune DELETE FIELD
 
550
RT Failure (Psychology) DELETE FIELD
 
550
RT Fear of success DELETE FIELD
 
550
BT Psychology ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Sumatran orangutans    [May Subd Geog]    [sp2025050322]
 
053
QL737.P94 (Zoology)
 
450
UF Orangutans, Sumatran
 
450
UF Pongo abelii
 
450
UF Sumatran orangutan
 
550
BT Orangutans
 
680
When this heading is assigned, the second subject heading Orangutans is also assigned, e.g., 1. Sumatran orangutans. 2. Orangutans.
 
 
150
Tact    [Not Subd Geog]    [sp2021057348]
 
053
BJ1533.T DELETE FIELD
 
053
BJ1533.T33 (Ethics) ADD FIELD
 
550
BT Social intelligence DELETE FIELD
 
550
RT Discretion DELETE FIELD
 
550
RT Prudence DELETE FIELD
 
550
RT Thoughtfulness DELETE FIELD
 
550
BT Conduct of life ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Taoist fasts and feasts    [May Subd Geog]    [sp2025050372]
 
450
UF Taoist feasts and fasts
 
450
UF Taoist festivals
 
450
UF Taoists holidays
 
450
UF Fasts and feasts--Taoism
 
450
UF Feasts and fasts--Taoism
 
550
BT Fasts and feasts
 
 
150
Taoist memorial rites and ceremonies    [May Subd Geog]    [sp2025050370]
 
450
UF Taoist ceremonies and memorial rites
 
450
UF Ceremonies and memorial rites, Taoist
 
450
UF Memorial rites and ceremonies, Taoist
 
550
BT Memorial rites and ceremonies
 
 
150
Tarsiers    [May Subd Geog]    [sp2025050321]
 
053
QL737.P965 (Zoology)
 
450
UF Tarsiidae
 
550
BT Carnivorous animals
 
550
BT Forest animals
 
550
BT Nocturnal animals
 
550
BT Primates
 
 
150
Thoughtfulness    [Not Subd Geog]    [sp2021052700]
 
053
BJ1533.T45 (Ethics) ADD FIELD
 
550
RT Tact DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD