Library of Congress CYAC Subject Headings
LIBRARY OF CONGRESS CYAC SUBJECT HEADINGS
APPROVED MONTHLY LIST 07 CYAC


Select this link to view the Summary of Decisions of the editorial meeting.

 
 
CHILDREN'S SUBJECT HEADINGS
 
150
Aphids    [May Subd Geog] CHANGE GEOG    [sp2021056962]
 
053
SB945.A5 (Pests) DELETE FIELD
 
053
SB945.A5 (Plant culture) ADD FIELD
 
450
UF Aphidae DELETE FIELD
 
450
UF Aphididae [Former heading] DELETE FIELD
 
450
UF Eriosomatidae DELETE FIELD
 
450
UF Lachnidae DELETE FIELD
 
450
UF Pemphigidae DELETE FIELD
 
450
UF Plant-lice [Former heading] DELETE FIELD
 
450
UF Thelaxidae DELETE FIELD
 
450
UF Ant cows ADD FIELD
 
450
UF Ant's cows ADD FIELD
 
450
UF Aphididae ADD FIELD
 
450
UF Greenfly ADD FIELD
 
450
UF Greenflies ADD FIELD
 
450
UF Plant lice ADD FIELD
 
450
UF Plant louse ADD FIELD
 
450
UF Plantlouse ADD FIELD
 
550
BT Homoptera DELETE FIELD
 
550
BT Parasitic insects ADD FIELD
 
550
BT True bugs ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Asphyxia    [Not Subd Geog] CHANGE GEOG    [sp2021053344]
 
053
RA1071-RA1082.2 (Medical jurisprudence) DELETE FIELD
 
053
RJ256 (Newborn infants) DELETE FIELD
 
053
RA1071-RA1082.2 (Public aspects of medicine) ADD FIELD
 
053
RJ256 (Pediatrics) ADD FIELD
 
550
BT Accidents DELETE FIELD
 
550
BT Death--Causes DELETE FIELD
 
550
BT Respiratory system--Diseases DELETE FIELD
 
550
BT Causes of death ADD FIELD
 
550
BT Respiratory system diseases ADD FIELD
 
 
150
Assassin bugs    [May Subd Geog] CHANGE GEOG    [sp2021059247]
 
450
UF Emesidae DELETE FIELD
 
450
UF Ploiariidae DELETE FIELD
 
450
UF Reduviid bugs DELETE FIELD
 
450
UF Reduviidae [Former heading] DELETE FIELD
 
450
UF Reduviidae ADD FIELD
 
550
BT Hemiptera DELETE FIELD
 
550
BT True bugs ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Bedbugs CHANGE HEADING
 
150
Bed bugs    [May Subd Geog] CHANGE GEOG    [sp2021060868]
 
053
QL523.C6 (Zoology)
 
450
UF Bedbugs [Former heading]
 
450
UF Cimicidae
 
450
UF Cimicids
 
550
BT Bloodsucking insects
 
550
BT Parasitic insects
 
550
BT True bugs
 
688
Heading changed from Bedbugs to Bed bugs in July 2025.
 
 
150
Betrayal    [Not Subd Geog]    [sp2021058847]
 
053
BJ1500.B47 (Ethics) ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Central nervous system--Diseases CHANGE HEADING
 
150
Central nervous system diseases    [May Subd Geog] CHANGE GEOG    [sp2022050088]
 
053
RC360-RC406 (Internal medicine)
 
450
UF Central nervous system--Diseases [Former heading]
 
550
BT Nervous system diseases
 
688
Established April 2022. Heading changed from Central nervous system--Diseases to Central nervous system diseases in July 2025.
 
 
150
Character    [Not Subd Geog]    [sp2021053302]
 
053
BJ1518-BJ1535 (Ethics) DELETE FIELD
 
053
LC251-LC301 (Character building) DELETE FIELD
 
053
BJ1518-BJ1697.2 (Ethics) ADD FIELD
 
450
UF Ethology DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Cicadas    [May Subd Geog] CHANGE GEOG    [sp2021055898]
 
053
QL527.C5 DELETE FIELD
 
053
QL527.C5 (Zoology) ADD FIELD
 
450
UF Cicadidae [Former heading] DELETE FIELD
 
450
UF Cicadoidea DELETE FIELD
 
450
UF Cicadidae ADD FIELD
 
550
BT Homoptera DELETE FIELD
 
550
BT True bugs ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Compromise (Ethics) CHANGE HEADING
 
150
Compromise    [Not Subd Geog]    [sp2021057793]
 
053
BJ1430-BJ1438 (Ethics)
 
450
UF Compromise (Ethics) [Former heading]
 
550
BT Ethics
 
688
Heading changed from Compromise (Ethics) to Compromise in July 2025.
 
 
150
Conscience    [Not Subd Geog]    [sp2021053435]
 
550
RT Guilt DELETE FIELD
 
550
RT Superego DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Discipline    [Not Subd Geog]    [sp2021056174]
 
053
BJ1533.D49 DELETE FIELD
 
053
BJ1533.D49 (Ethics) ADD FIELD
 
550
BT Behavior ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Duty    [Not Subd Geog]    [sp2021060594]
 
053
BJ1450-BJ1458 DELETE FIELD
 
053
BJ1450-BJ1458 (Ethics) ADD FIELD
 
450
UF Deontology DELETE FIELD
 
550
RT Supererogation DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Environmentally induced diseases CHANGE HEADING
 
150
Environmental diseases    [May Subd Geog] CHANGE GEOG    [sp2021053087]
 
053
RB152.5-RB152.7 (Pathology)
 
450
UF Diseases--Environmental aspects
 
450
UF Environmental illnesses
 
450
UF Environmentally induced diseases [Former heading]
 
450
UF Environmentally induced illnesses
 
550
BT Causes and origins of diseases
 
550
BT Environmental health
 
688
Heading changed from Environmentally induced diseases to Environmental diseases in August 2025.
 
 
150
Ethics    [Not Subd Geog]    [sp2021050978]
 
053
BJ DELETE FIELD
 
053
BJ1-BJ1725 (Ethics) ADD FIELD
 
360
SA subdivision Ethics under names of individual persons and legislative bodies; and subdivision Moral and ethical aspects under non-religious or non-ethical topics DELETE FIELD
 
450
UF Deontology DELETE FIELD
 
450
UF Ethics, Primitive [Former heading] DELETE FIELD
 
450
UF Ethology DELETE FIELD
 
450
UF Philosophy, Moral DELETE FIELD
 
450
UF Science, Moral DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Fulgorids CHANGE HEADING
 
150
Fulgorid planthoppers    [May Subd Geog] ADD GEOG    [sp2002001051]
 
053
QL527.F9 (Zoology)
 
450
UF Fulgorid plant hoppers
 
450
UF Fulgoridae
 
450
UF Fulgorids [Former heading]
 
450
UF Peanut-head bugs
 
550
BT True bugs
 
688
Heading changed from Fulgorids to Fulgorid planthoppers in July 2025.
 
 
150
Germ theory of disease CHANGE HEADING
 
150
Germ theory    [May Subd Geog] CHANGE GEOG    [sp2021059587]
 
053
RB153 (Pathology)
 
450
UF Germ theory of disease [Former heading]
 
550
BT Causes and origins of diseases
 
688
Heading changed from Germ theory of disease to Germ theory in July 2025.
 
 
150
Hair    [Not Subd Geog]    [sp2021051153]
 
053
GN193 (Physical anthropology) DELETE FIELD
 
053
QL942 (Comparative anatomy) DELETE FIELD
 
053
GN193 (Anthropology) ADD FIELD
 
053
QL942 (Zoology) ADD FIELD
 
550
BT Head DELETE FIELD
 
550
RT Scalp DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Infection    [May Subd Geog] CHANGE GEOG    [sp2021051084]
 
360
SA subdivision Infections under individual organs and regions of the body, and individual animals and groups of animals, e.g. Heart--Infections; Foot--Infections; Cattle--Infections; Fishes--Infections DELETE FIELD
 
450
UF Infectious diseases DELETE FIELD
 
450
UF Infection and infestation ADD FIELD
 
450
UF Infections ADD FIELD
 
450
UF Infections and infestations ADD FIELD
 
450
UF Infestation and infection ADD FIELD
 
450
UF Infestations and infections ADD FIELD
 
550
BT Diseases--Causes and theories of causation DELETE FIELD
 
550
BT Causes and origins of diseases ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Integumentary system    [Not Subd Geog]    [sp2025050117]
 
550
BT Organs (Anatomy)
 
 
150
Large milkweed bug CHANGE HEADING
 
150
Large milkweed bugs    [May Subd Geog] CHANGE GEOG    [sp2021058643]
 
053
QL523.L9 (Zoology)
 
450
UF Large milkweed bug [Former heading]
 
450
UF Oncopeltus fasciatus
 
550
BT True bugs
 
680
When this heading is assigned, the second subject heading True bugs is also assigned, e.g., 1. Large milkweed bugs. 2. True bugs.
 
688
Heading changed from Large milkweed bug to Large milkweed bugs in July 2025.
 
 
150
Leafhoppers    [May Subd Geog] CHANGE GEOG    [sp2021059296]
 
053
SB945.L5 (Pests) DELETE FIELD
 
053
SB945.L5 (Plant culture) ADD FIELD
 
450
UF Agalliidae DELETE FIELD
 
450
UF Aphrodidae DELETE FIELD
 
450
UF Bythoscopidae DELETE FIELD
 
450
UF Coelidiidae DELETE FIELD
 
450
UF Deltocephalidae DELETE FIELD
 
450
UF Euacanthidae DELETE FIELD
 
450
UF Eurymelidae DELETE FIELD
 
450
UF Euscelidae DELETE FIELD
 
450
UF Evacanthidae DELETE FIELD
 
450
UF Gyponidae DELETE FIELD
 
450
UF Hecalidae DELETE FIELD
 
450
UF Hylicidae DELETE FIELD
 
450
UF Iassidae DELETE FIELD
 
450
UF Idioceridae DELETE FIELD
 
450
UF Koebeliidae DELETE FIELD
 
450
UF Ledridae DELETE FIELD
 
450
UF Macropsidae DELETE FIELD
 
450
UF Megophthalmidae DELETE FIELD
 
450
UF Neobalidae DELETE FIELD
 
450
UF Neocoelidiidae DELETE FIELD
 
450
UF Nirvanidae DELETE FIELD
 
450
UF Paropiidae DELETE FIELD
 
450
UF Penthimiidae DELETE FIELD
 
450
UF Proconiidae DELETE FIELD
 
450
UF Pythamidae DELETE FIELD
 
450
UF Signoretiidae DELETE FIELD
 
450
UF Stenocotidae DELETE FIELD
 
450
UF Tettigellidae DELETE FIELD
 
450
UF Tettigoniellidae DELETE FIELD
 
450
UF Tettigoniidae (Homoptera) DELETE FIELD
 
450
UF Thaumastoscopidae DELETE FIELD
 
450
UF Typhlocybidae DELETE FIELD
 
450
UF Ulopidae DELETE FIELD
 
450
UF Cicadellids ADD FIELD
 
450
UF Jassids ADD FIELD
 
450
UF Sharpshooters (Insects) ADD FIELD
 
550
BT Homoptera DELETE FIELD
 
550
BT True bugs ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Nails (Anatomy)    [Not Subd Geog]    [sp2021059639]
 
053
QL942 (Comparative anatomy) DELETE FIELD
 
053
QL942 (Zoology) ADD FIELD
 
550
BT Skin DELETE FIELD
 
550
BT Integumentary system ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Nerves    [Not Subd Geog]    [sp2021059563]
 
053
QL939 (Comparative anatomy) DELETE FIELD
 
053
QP361-QP369.5 (Physiology) DELETE FIELD
 
053
QL939 (Zoology) ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Nervous system    [Not Subd Geog]    [sp2021053658]
 
053
QL921-QL939 (Comparative anatomy) DELETE FIELD
 
053
QP351-QP430 (Physiology) DELETE FIELD
 
053
QL921-QL939 (Zoology) ADD FIELD
 
360
SA subdivision Innervation under individual organs and regions of the body, e.g. Heart--Innervation; Foot--Innervation; and subdivision Nervous system under individual animals and groups of animals, e.g. Fishes--Nervous system DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Neurons    [Not Subd Geog]    [sp2021055584]
 
450
UF Neurones ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Promises    [Not Subd Geog]    [sp2021052838]
 
053
BJ1500.P7 DELETE FIELD
 
053
BJ1500.P7 (Ethics) ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Purity (Ethics) CHANGE HEADING
 
150
Purity    [Not Subd Geog]    [sp2021059164]
 
053
BJ1533.P97 (Ethics)
 
450
UF Purity (Ethics) [Former heading]
 
550
BT Ethics
 
550
BT Philosophy
 
688
Heading changed from Purity (Ethics) to Purity in July 2025.
 
 
150
Responsibility    [Not Subd Geog]    [sp2021052202]
 
053
BJ171.R4 (Ethics) ADD FIELD
 
450
UF Accountability DELETE FIELD
 
450
UF Moral responsibility DELETE FIELD
 
450
UF Obligation DELETE FIELD
 
550
RT Supererogation DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Side effects of drugs    [May Subd Geog]    [sp2025050246]
 
053
RM302.5 (Therapeutics)
 
450
UF Adverse reaction to drugs
 
450
UF Drug adverse reactions
 
450
UF Drug side effects
 
450
UF Drug side reactions
 
450
UF Drugs--Adverse reactions
 
450
UF Drugs--Side effects
 
450
UF Drugs--Side reactions
 
450
UF Side reactions to drugs
 
550
BT Pharmacology
 
 
150
Skin    [Not Subd Geog]    [sp2021052993]
 
053
QL941 (Comparative anatomy) DELETE FIELD
 
053
QM481-QM484 (Human anatomy) DELETE FIELD
 
053
QL941 (Zoology) ADD FIELD
 
053
QM484 (Human anatomy) ADD FIELD
 
450
UF Cutis DELETE FIELD
 
450
UF Integument (Skin) DELETE FIELD
 
550
BT Beauty, Personal DELETE FIELD
 
550
BT Body covering (Anatomy) DELETE FIELD
 
550
BT Integumentary system ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Spinal cord    [Not Subd Geog]    [sp2021056136]
 
053
QL938.S6 (Comparative anatomy) DELETE FIELD
 
053
QP371-QP375 (Physiology) DELETE FIELD
 
053
QL938.S6 (Zoology) ADD FIELD
 
053
QP371 (Physiology) ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Spittle insects CHANGE HEADING
 
150
Spittlebugs    [May Subd Geog] ADD GEOG    [sp 96006187 ]
 
053
QL527.C4 (Zoology)
 
053
SB945.C44 (Plant culture)
 
450
UF Cercopidae
 
450
UF Cuckoo spit insects
 
450
UF Frog hoppers
 
450
UF Froghoppers
 
450
UF Spittle bugs
 
450
UF Spittle insects [Former heading]
 
550
BT True bugs
 
688
Heading changed from Spittle insects to Spittlebugs in July 2025.
 
 
150
Stinkbugs CHANGE HEADING
 
150
Stink bugs    [May Subd Geog] CHANGE GEOG    [sp2021059750]
 
053
QL523.P5 (Zoology)
 
053
SB945.P47 (Plant culture)
 
450
UF Pentatomidae
 
450
UF Pentatomids
 
450
UF Podopidae
 
450
UF Shield bugs
 
450
UF Stinkbugs [Former heading]
 
450
UF Terrestrial turtle bugs
 
550
BT Pests
 
550
BT True bugs
 
688
Heading changed from Stinkbugs to Stink bugs in July 2025.
 
 
150
Stroke    [May Subd Geog]    [sp2025050247]
 
053
RC388.5 (Internal medicine)
 
450
UF Apoplexy
 
450
UF Brain attack
 
450
UF Brain vascular accident
 
450
UF Cerebral hemorrhage
 
450
UF Cerebral stroke
 
450
UF Cerebral vascular accident
 
450
UF Cerebrovascular accident
 
450
UF Cerebrovascular apoplexy
 
450
UF Cerebrovascular stroke
 
450
UF CVA (Cerebrovascular accident)
 
550
BT Cerebrovascular diseases
 
 
150
Temptation    [Not Subd Geog]    [sp2021054382]
 
053
BT725 (Christian theology) DELETE FIELD
 
450
UF Enticement ADD FIELD
 
550
BT Sin DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
True bugs    [May Subd Geog]    [sp2024050044]
 
053
QL521-QL524.2 (Zoology)
 
450
UF Hemiptera
 
450
UF Hemipterans
 
450
UF Heteroptera
 
450
UF Heteropterans
 
550
BT Insects
 
681
Example under Large milkweed bugs
 
 
150
Vocation    [Not Subd Geog]    [sp2021057679]
 
053
BV4011.4 (Practical theology) ADD FIELD
 
550
BT Duty DELETE FIELD
 
550
BT Ethics DELETE FIELD
 
550
BT Work DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
680
Here are entered works dealing with the occupation of an individual in the sense of employment to which he is destined by nature, or called, as it were, by some higher power. DELETE FIELD
 
680
Here are entered works dealing with the occupation of an individual in the sense of employment to which one is destined by nature, or called, as it were, by some higher power. ADD FIELD
 
 
150
Water bugs CHANGE HEADING
 
150
Giant water bugs    [May Subd Geog] ADD GEOG    [sp 96006360 ]
 
053
QL523.B4 (Zoology)
 
450
UF Alligator fleas
 
450
UF Alligator ticks
 
450
UF Belostomatidae
 
450
UF Belostomatids
 
450
UF Electric light bugs
 
450
UF Toe-biters (Insects)
 
450
UF Water bugs [Former heading]
 
550
BT Aquatic insects
 
550
BT Predatory insects
 
550
BT True bugs
 
688
Heading changed from Water bugs to Giant water bugs in July 2025.
 
 
150
Will    [Not Subd Geog]    [sp2021057430]
 
053
BJ1460-BJ1468 (Ethics) DELETE FIELD
 
053
LB1071 (Psychology, Educational) DELETE FIELD
 
053
BJ1460-BJ1468.5 (Ethics) ADD FIELD
 
053
LB1071 (Theory and practice of education) ADD FIELD
 
450
UF Cetanā DELETE FIELD
 
450
UF Conation DELETE FIELD
 
550
RT Self DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Work ethic    [Not Subd Geog]    [sp2021054357]
 
053
HD4905 DELETE FIELD
 
053
HD4905 (Industries) ADD FIELD
 
450
UF Ethic, Work DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD