List of the IAB categories

Category	iab value	Segment size (*)	Segment size (in a week)
arts and entertainment	iab 1	****	1 000 000 - 9 999 999
books and literature	iab 1-1	***	500 000 - 999 999
celebrity fan or gossip	iab 1-2	****	1 000 000 - 9 999 999
fine art	iab 1-3	***	500 000 - 999 999
humor	iab 1-4	****	1 000 000 - 9 999 999
movies	iab 1-5	*****	10 000 000+
music	iab 1-6	*****	10 000 000+
television	iab 1-7	****	1 000 000 - 9 999 999
automotive	iab 2	*****	10 000 000+
auto parts	iab 2-1	****	1 000 000 - 9 999 999
auto repair	iab 2-2	*	1 - 99 999
buying or selling cars	iab 2-3	***	500 000 - 999 999
car culture	iab 2-4	**	100 000 - 499 999
convertible	iab 2-6	*	1 - 99 999
coupe	iab 2-7	*	1 - 99 999
crossover	iab 2-8	**	100 000 - 499 999
diesel	iab 2-9	****	1 000 000 - 9 999 999
electric vehicle	iab 2-10	****	1 000 000 - 9 999 999
hatchback	iab 2-11	*	1 - 99 999
hybrid	iab 2-12	****	1 000 000 - 9 999 999
luxury	iab 2-13	***	500 000 - 999 999
minivan	iab 2-14	*	1 - 99 999
motorcycles	iab 2-15	***	500 000 - 999 999
off-road vehicles	iab 2-16	**	100 000 - 499 999
performance vehicles	iab 2-17	**	100 000 - 499 999
pickup	iab 2-18	*	1 - 99 999
road-side assistance	iab 2-19	*	1 - 99 999
sedan	iab 2-20	*	1 - 99 999
trucks and accessories	iab 2-21	****	1 000 000 - 9 999 999
vintage cars	iab 2-22	**	100 000 - 499 999
wagon	iab 2-23	****	1 000 000 - 9 999 999
business	iab 3	*****	10 000 000+
advertising	iab 3-1	**	100 000 - 499 999
logistics	iab 3-10	**	100 000 - 499 999
marketing	iab 3-11	**	100 000 - 499 999
metals	iab 3-12	***	500 000 - 999 999
agriculture	iab 3-2	****	1 000 000 - 9 999 999
biotech or biomedical	iab 3-3	*	1 - 99 999
business software	iab 3-4	*	1 - 99 999
construction	iab 3-5	****	1 000 000 - 9 999 999
forestry	iab 3-6	**	100 000 - 499 999
government	iab 3-7	****	1 000 000 - 9 999 999
green solutions	iab 3-8	*	1 - 99 999
human resources	iab 3-9	**	100 000 - 499 999
careers	iab 4	****	1 000 000 - 9 999 999
career planning	iab 4-1	*	1 - 99 999
college	iab 4-2	*	1 - 99 999
financial aid	iab 4-3	**	100 000 - 499 999
job fairs	iab 4-4	*	1 - 99 999
job search	iab 4-5	****	1 000 000 - 9 999 999
resume writing or advice	iab 4-6	*	1 - 99 999
nursing	iab 4-7	***	500 000 - 999 999
scholarships	iab 4-8	*	1 - 99 999
telecommuting	iab 4-9	****	1 000 000 - 9 999 999
us military	iab 4-10	*	1 - 99 999
career advice	iab 4-11	*	1 - 99 999
education	iab 5	****	1 000 000 - 9 999 999
7-12 education	iab 5-1	****	1 000 000 - 9 999 999
adult education	iab 5-2	*	1 - 99 999
art history	iab 5-3	**	100 000 - 499 999
college administration	iab 5-4	**	100 000 - 499 999
college life	iab 5-5	*	1 - 99 999
distance learning	iab 5-6	*	1 - 99 999
english as a 2nd language	iab 5-7	*	1 - 99 999
language learning	iab 5-8	****	1 000 000 - 9 999 999
graduate school	iab 5-9	*	1 - 99 999
homeschooling	iab 5-10	**	100 000 - 499 999
homework or study tips	iab 5-11	*	1 - 99 999
k-6 educators	iab 5-12	*	1 - 99 999
private schools	iab 5-13	**	100 000 - 499 999
special education	iab 5-14	*	1 - 99 999
studying business	iab 5-15	*	1 - 99 999
family and parenting	iab 6	*****	10 000 000+
adoption	iab 6-1	*	1 - 99 999
babies and toddlers	iab 6-2	*****	10 000 000+
daycare or pre school	iab 6-3	****	1 000 000 - 9 999 999
parenting - k-6 kids	iab 6-5	*	1 - 99 999
parenting teenagers	iab 6-6	*	1 - 99 999
pregnancy	iab 6-7	****	1 000 000 - 9 999 999
special needs kids	iab 6-8	**	100 000 - 499 999
eldercare	iab 6-9	****	1 000 000 - 9 999 999
health and fitness	iab 7	*****	10 000 000+
exercise	iab 7-1	****	1 000 000 - 9 999 999
add	iab 7-2	**	100 000 - 499 999
aids or hiv	iab 7-3	*	1 - 99 999
allergies	iab 7-4	***	500 000 - 999 999
alternative medicine	iab 7-5	**	100 000 - 499 999
arthritis	iab 7-6	*	1 - 99 999
asthma	iab 7-7	**	100 000 - 499 999
autism or pdd	iab 7-8	**	100 000 - 499 999
bipolar disorder	iab 7-9	**	100 000 - 499 999
brain tumor	iab 7-10	***	500 000 - 999 999
cancer	iab 7-11	****	1 000 000 - 9 999 999
cholesterol	iab 7-12	**	100 000 - 499 999
chronic fatigue syndrome	iab 7-13	*	1 - 99 999
chronic pain	iab 7-14	*	1 - 99 999
cold and flu	iab 7-15	****	1 000 000 - 9 999 999
deafness	iab 7-16	*	1 - 99 999
dental care	iab 7-17	**	100 000 - 499 999
depression	iab 7-18	****	1 000 000 - 9 999 999
dermatology	iab 7-19	***	500 000 - 999 999
diabetes	iab 7-20	***	500 000 - 999 999
gerd or acid reflux	iab 7-22	**	100 000 - 499 999
headaches or migraines	iab 7-23	**	100 000 - 499 999
heart disease	iab 7-24	****	1 000 000 - 9 999 999
herbs for health	iab 7-25	*	1 - 99 999
holistic healing	iab 7-26	*	1 - 99 999
ibs or crohns disease	iab 7-27	**	100 000 - 499 999
incontinence	iab 7-29	*	1 - 99 999
infertility	iab 7-30	**	100 000 - 499 999
mens health	iab 7-31	**	100 000 - 499 999
nutrition	iab 7-32	****	1 000 000 - 9 999 999
orthopedics	iab 7-33	**	100 000 - 499 999
panic or anxiety disorders	iab 7-34	****	1 000 000 - 9 999 999
pediatrics	iab 7-35	*	1 - 99 999
physical therapy	iab 7-36	**	100 000 - 499 999
psychology or psychiatry	iab 7-37	**	100 000 - 499 999
senior health	iab 7-38	****	1 000 000 - 9 999 999
sexuality	iab 7-39	****	1 000 000 - 9 999 999
sleep disorders	iab 7-40	****	1 000 000 - 9 999 999
smoking cessation	iab 7-41	*	1 - 99 999
substance abuse	iab 7-42	****	1 000 000 - 9 999 999
thyroid disease	iab 7-43	*	1 - 99 999
weight loss	iab 7-44	****	1 000 000 - 9 999 999
womens health	iab 7-45	**	100 000 - 499 999
food and drink	iab 8	*****	10 000 000+
american cuisine	iab 8-1	*	1 - 99 999
barbecues and grilling	iab 8-2	*	1 - 99 999
chinese cuisine	iab 8-4	*	1 - 99 999
cocktails or beer	iab 8-5	**	100 000 - 499 999
coffee or tea	iab 8-6	**	100 000 - 499 999
cuisine-specific	iab 8-7	***	500 000 - 999 999
desserts and baking	iab 8-8	****	1 000 000 - 9 999 999
dining out	iab 8-9	****	1 000 000 - 9 999 999
food allergies	iab 8-10	*	1 - 99 999
french cuisine	iab 8-11	*	1 - 99 999
health or lowfat cooking	iab 8-12	*	1 - 99 999
italian cuisine	iab 8-13	****	1 000 000 - 9 999 999
japanese cuisine	iab 8-14	**	100 000 - 499 999
mexican cuisine	iab 8-15	*	1 - 99 999
vegan	iab 8-16	**	100 000 - 499 999
vegetarian	iab 8-17	**	100 000 - 499 999
wine	iab 8-18	****	1 000 000 - 9 999 999
hobbies and interests	iab 9	****	1 000 000 - 9 999 999
art or technology	iab 9-1	****	1 000 000 - 9 999 999
arts and crafts	iab 9-2	***	500 000 - 999 999
beadwork	iab 9-3	*	1 - 99 999
birdwatching	iab 9-4	*	1 - 99 999
board games or puzzles	iab 9-5	****	1 000 000 - 9 999 999
card games	iab 9-7	*	1 - 99 999
chess	iab 9-8	**	100 000 - 499 999
cigars	iab 9-9	*	1 - 99 999
collecting	iab 9-10	**	100 000 - 499 999
comic books	iab 9-11	*	1 - 99 999
drawing or sketching	iab 9-12	*	1 - 99 999
freelance writing	iab 9-13	*	1 - 99 999
genealogy	iab 9-14	**	100 000 - 499 999
getting published	iab 9-15	*	1 - 99 999
guitar	iab 9-16	****	1 000 000 - 9 999 999
home recording	iab 9-17	*	1 - 99 999
investors and patents	iab 9-18	****	1 000 000 - 9 999 999
jewelry making	iab 9-19	*	1 - 99 999
magic and illusion	iab 9-20	**	100 000 - 499 999
needlework	iab 9-21	*	1 - 99 999
painting	iab 9-22	***	500 000 - 999 999
photography	iab 9-23	**	100 000 - 499 999
radio	iab 9-24	****	1 000 000 - 9 999 999
roleplaying games	iab 9-25	*	1 - 99 999
sci-fi and fantasy	iab 9-26	**	100 000 - 499 999
screenwriting	iab 9-28	****	1 000 000 - 9 999 999
stamps and coins	iab 9-29	*	1 - 99 999
video and computer games	iab 9-30	****	1 000 000 - 9 999 999
woodworking	iab 9-31	*	1 - 99 999
home and garden	iab 10	****	1 000 000 - 9 999 999
appliances	iab 10-1	**	100 000 - 499 999
entertaining	iab 10-2	**	100 000 - 499 999
environmental safety	iab 10-3	****	1 000 000 - 9 999 999
gardening	iab 10-4	****	1 000 000 - 9 999 999
home repair	iab 10-5	*	1 - 99 999
home theatre	iab 10-6	*	1 - 99 999
interior decoration	iab 10-7	****	1 000 000 - 9 999 999
landscaping	iab 10-8	*	1 - 99 999
remodeling and construction	iab 10-9	****	1 000 000 - 9 999 999
law govt and politics	iab 11	*****	10 000 000+
immigration	iab 11-1	*****	10 000 000+
legal issues	iab 11-2	***	500 000 - 999 999
us government resources	iab 11-3	*****	10 000 000+
politics	iab 11-4	*****	10 000 000+
commentary	iab 11-5	*	1 - 99 999
personal finance	iab 13	*****	10 000 000+
beginning investing	iab 13-1	****	1 000 000 - 9 999 999
retirement planning	iab 13-10	*	1 - 99 999
stocks	iab 13-11	****	1 000 000 - 9 999 999
tax planning	iab 13-12	****	1 000 000 - 9 999 999
credit or debt and loans	iab 13-2	****	1 000 000 - 9 999 999
financial news	iab 13-3	*	1 - 99 999
financial planning	iab 13-4	****	1 000 000 - 9 999 999
hedge fund	iab 13-5	*	1 - 99 999
insurance	iab 13-6	**	100 000 - 499 999
investing	iab 13-7	**	100 000 - 499 999
mutual funds	iab 13-8	*	1 - 99 999
options	iab 13-9	**	100 000 - 499 999
society	iab 14	*****	10 000 000+
dating	iab 14-1	****	1 000 000 - 9 999 999
divorce support	iab 14-2	*	1 - 99 999
gay life	iab 14-3	**	100 000 - 499 999
marriage	iab 14-4	****	1 000 000 - 9 999 999
senior living	iab 14-5	**	100 000 - 499 999
teens	iab 14-6	**	100 000 - 499 999
weddings	iab 14-7	****	1 000 000 - 9 999 999
ethnic specific	iab 14-8	*	1 - 99 999
science	iab 15	*****	10 000 000+
astrology	iab 15-1	****	1 000 000 - 9 999 999
weather	iab 15-10	*****	10 000 000+
biology	iab 15-2	**	100 000 - 499 999
chemistry	iab 15-3	**	100 000 - 499 999
geology	iab 15-4	**	100 000 - 499 999
paranormal phenomena	iab 15-5	*	1 - 99 999
physics	iab 15-6	*	1 - 99 999
space or astronomy	iab 15-7	****	1 000 000 - 9 999 999
geography	iab 15-8	*	1 - 99 999
botany	iab 15-9	*	1 - 99 999
pets	iab 16	****	1 000 000 - 9 999 999
aquariums	iab 16-1	*	1 - 99 999
birds	iab 16-2	*	1 - 99 999
cats	iab 16-3	**	100 000 - 499 999
dogs	iab 16-4	***	500 000 - 999 999
reptiles	iab 16-6	*	1 - 99 999
veterinary medicine	iab 16-7	*	1 - 99 999
sports	iab 17	*****	10 000 000+
auto racing	iab 17-1	*****	10 000 000+
baseball	iab 17-2	*	1 - 99 999
bicycling	iab 17-3	****	1 000 000 - 9 999 999
bodybuilding	iab 17-4	**	100 000 - 499 999
boxing	iab 17-5	***	500 000 - 999 999
canoeing or kayaking	iab 17-6	**	100 000 - 499 999
cheerleading	iab 17-7	*	1 - 99 999
climbing	iab 17-8	**	100 000 - 499 999
cricket	iab 17-9	*	1 - 99 999
figure skating	iab 17-10	**	100 000 - 499 999
fly fishing	iab 17-11	**	100 000 - 499 999
football	iab 17-12	*	1 - 99 999
freshwater fishing	iab 17-13	*	1 - 99 999
game and fish	iab 17-14	****	1 000 000 - 9 999 999
golf	iab 17-15	***	500 000 - 999 999
horse racing	iab 17-16	***	500 000 - 999 999
horses	iab 17-17	****	1 000 000 - 9 999 999
hunting or shooting	iab 17-18	**	100 000 - 499 999
inline skating	iab 17-19	*	1 - 99 999
martial arts	iab 17-20	****	1 000 000 - 9 999 999
mountain biking	iab 17-21	**	100 000 - 499 999
nascar racing	iab 17-22	*	1 - 99 999
olympics	iab 17-23	****	1 000 000 - 9 999 999
paintball	iab 17-24	*	1 - 99 999
power and motorcycles	iab 17-25	*	1 - 99 999
pro basketball	iab 17-26	****	1 000 000 - 9 999 999
pro ice hockey	iab 17-27	*****	10 000 000+
rodeo	iab 17-28	*	1 - 99 999
rugby	iab 17-29	*	1 - 99 999
running or jogging	iab 17-30	*****	10 000 000+
sailing	iab 17-31	****	1 000 000 - 9 999 999
saltwater fishing	iab 17-32	*	1 - 99 999
scuba diving	iab 17-33	*	1 - 99 999
skateboarding	iab 17-34	**	100 000 - 499 999
skiing	iab 17-35	****	1 000 000 - 9 999 999
snowboarding	iab 17-36	*	1 - 99 999
surfing or bodyboarding	iab 17-37	*	1 - 99 999
swimming	iab 17-38	****	1 000 000 - 9 999 999
table tennis or ping-pong	iab 17-39	*	1 - 99 999
tennis	iab 17-40	**	100 000 - 499 999
volleyball	iab 17-41	**	100 000 - 499 999
walking	iab 17-42	**	100 000 - 499 999
waterski or wakeboard	iab 17-43	*	1 - 99 999
world soccer	iab 17-44	****	1 000 000 - 9 999 999
style and fashion	iab 18	*****	10 000 000+
beauty	iab 18-1	****	1 000 000 - 9 999 999
body art	iab 18-2	***	500 000 - 999 999
fashion	iab 18-3	****	1 000 000 - 9 999 999
jewelry	iab 18-4	**	100 000 - 499 999
clothing	iab 18-5	***	500 000 - 999 999
accessories	iab 18-6	***	500 000 - 999 999
technology and computing	iab 19	*****	10 000 000+
3-d graphics	iab 19-1	*	1 - 99 999
animation	iab 19-2	*	1 - 99 999
antivirus software	iab 19-3	*	1 - 99 999
c or c plus plus	iab 19-4	*	1 - 99 999
cameras and camcorders	iab 19-5	***	500 000 - 999 999
cell phones	iab 19-6	****	1 000 000 - 9 999 999
computer networking	iab 19-8	*	1 - 99 999
computer peripherals	iab 19-9	*	1 - 99 999
computer reviews	iab 19-10	**	100 000 - 499 999
data centers	iab 19-11	*	1 - 99 999
databases	iab 19-12	*	1 - 99 999
desktop publishing	iab 19-13	*	1 - 99 999
email	iab 19-15	**	100 000 - 499 999
graphics software	iab 19-16	*	1 - 99 999
home video or dvd	iab 19-17	*	1 - 99 999
java	iab 19-19	*	1 - 99 999
javascript	iab 19-20	*	1 - 99 999
mp3 or midi	iab 19-22	*	1 - 99 999
net conferencing	iab 19-23	*	1 - 99 999
net for beginners	iab 19-24	*	1 - 99 999
network security	iab 19-25	****	1 000 000 - 9 999 999
palmtops or pdas	iab 19-26	*	1 - 99 999
pc support	iab 19-27	*	1 - 99 999
portable entertainment	iab 19-28	*	1 - 99 999
entertainment	iab 19-29	**	100 000 - 499 999
shareware or freeware	iab 19-30	*	1 - 99 999
unix	iab 19-31	*	1 - 99 999
web design or html	iab 19-34	*	1 - 99 999
web search	iab 19-35	**	100 000 - 499 999
windows	iab 19-36	*	1 - 99 999
travel	iab 20	*****	10 000 000+
adventure travel	iab 20-1	**	1 - 99 999
canada	iab 20-10	**	100 000 - 499 999
caribbean	iab 20-11	*	1 - 99 999
cruises	iab 20-12	****	1 000 000 - 9 999 999
eastern europe	iab 20-13	*	1 - 99 999
europe	iab 20-14	***	100 000 - 499 999
france	iab 20-15	**	1 - 99 999
greece	iab 20-16	**	1 - 99 999
honeymoons or getaways	iab 20-17	*	1 - 99 999
hotels	iab 20-18	****	1 000 000 - 9 999 999
italy	iab 20-19	**	1 - 99 999
africa	iab 20-2	**	100 000 - 499 999
mexico and central america	iab 20-21	**	100 000 - 499 999
national parks	iab 20-22	**	1 - 99 999
south america	iab 20-23	**	1 - 99 999
spas	iab 20-24	*	1 - 99 999
theme parks	iab 20-25	***	500 000 - 999 999
traveling with kids	iab 20-26	*	1 - 99 999
united kingdom	iab 20-27	***	500 000 - 999 999
air travel	iab 20-3	**	100 000 - 499 999
australia and new zealand	iab 20-4	*	1 - 99 999
bed and breakfasts	iab 20-5	*	1 - 99 999
budget travel	iab 20-6	*	1 - 99 999
business travel	iab 20-7	*	1 - 99 999
by us locale	iab 20-8	*	1 - 99 999
camping	iab 20-9	**	100 000 - 499 999
real estate	iab 21	*****	10 000 000+
apartments	iab 21-1	*****	10 000 000+
architects	iab 21-2	**	100 000 - 499 999
buying or selling homes	iab 21-3	****	1 000 000 - 9 999 999
shopping	iab 22	***	500 000 - 999 999
contests and freebies	iab 22-1	*	1 - 99 999
couponing	iab 22-2	*	1 - 99 999
comparison	iab 22-3	*	1 - 99 999
engines	iab 22-4	*	1 - 99 999
religion and spirituality	iab 23	****	1 000 000 - 9 999 999
alternative religions	iab 23-1	*	1 - 99 999
pagan or wiccan	iab 23-10	*	1 - 99 999
atheism or agnosticism	iab 23-2	*	1 - 99 999
buddhism	iab 23-3	*	1 - 99 999
catholicism	iab 23-4	*	1 - 99 999
christianity	iab 23-5	***	500 000 - 999 999
hinduism	iab 23-6	*	1 - 99 999
islam	iab 23-7	****	1 000 000 - 9 999 999
judaism	iab 23-8	*	1 - 99 999
latter-day saints	iab 23-9	*	1 - 99 999
non-standard content	iab 25	*	1 - 99 999
extreme graphic or explicit violence	iab 25-2	*	1 - 99 999
pornography	iab 25-3	***	500 000 - 999 999
profane content	iab 25-4	*	1 - 99 999
hate content	iab 25-5	**	100 000 - 499 999
illegal content	iab 26	**	100 000 - 499 999
spyware or malware	iab 26-3	***	500 000 - 999 999
copyright infringement	iab 26-4	*	1 - 99 999