| Picture File | Related File | Code |
| Ice | | ICE |
| Ice cream | | ICE–Cre |
| Ice fishing | | ICE–Fis |
| Ice sailing | | ICE–Sai |
| Icebergs | | ICEBE |
| Icebreakers | | ICEBR |
| Iceland | | ICEL |
| Iceland — 1899 & earlier | | ICEL–18 |
| Icons | | ICO |
| Idaho | | IDA |
| Idaho — 1899 & earlier | | IDA–18 |
| Idaho — A–Z | | IDA–(A–Z) |
| Idaho — Life | | IDA–Lif |
| Identification devices | | IDE |
| Idols | | IDO |
| Illinois | | IL |
| Illinois — 1899 & earlier | | IL–18 |
| Illinois — A–Z | | IL–(A–Z) |
| Illinois — Chicago | | IL–Chi |
| Illinois — Chicago–1899 & earlier | IL–Chi–18 |
| Illinois — Industries | | IL–Ind |
| Illinois — Life | | IL–Lif |
| Illinois — Springfield | | IL–Spr |
| Illuminated books & manuscripts | | ILL |
| Illuminated books & manuscripts — 799 & earlier | ILL–7 |
| Illuminated books & manuscripts — 800s | ILL–8 |
| Illuminated books & manuscripts — 900s | ILL–9 |
| Illuminated books & manuscripts — 1000s | ILL–10 |
| Illuminated books & manuscripts — 1100s | ILL–11 |
| Illuminated books & manuscripts — 1200s | ILL–12 |
| Illuminated books & manuscripts — 1300s | ILL–13 |
| Illuminated books & manuscripts — 1400s | ILL–14 |
| Illuminated books & manuscripts — 1500s | ILL–15 |
| Illuminated books & manuscripts — 1600s–1900s | ILL–16 |
| Illuminated books & manuscripts — A–Z | ILL–(A–Z) |
| Illuminated books & manuscripts — Book of Kells | ILL–Boo |
| Illuminated books & manuscripts — Jewish | ILL–Jew |
| Illustrations — 1799 & earlier | ILLU–17 |
| Illustrations — 1800s | ILLU–18 |
| Illustrations — 1901s | ILLU–19 |
| Illustrations — 1910s | | ILLU–191 |
| Illustrations — 1920s | | ILLU–192 |
| Illustrations — 1930s | | ILLU–193 |
| Illustrations — 1940s | | ILLU–194 |
| Illustrations — 1950s | | ILLU–195 |
| Illustrations — 1960s | | ILLU–196 |
| Illustrations — 1970s | | ILLU–197 |
| Illustrations — 1980s | | ILLU–198 |
| Illustrations — 1990s | | ILLU–199 |
| Illustrations — 2001s | | ILLU–200 |
| Illustrations (Subdivided by artist) — A | | ILLU–(A) |
| Illustrations — Artzybasheff | | ILLU–Art |
| Illustrations — Ba–Bl | | ILLU–(Ba–Bl) |
| Illustrations — Barbier | | ILLU–Bar |
| Illustrations — Barclay | | ILLU–Barc |
| Illustrations — Beardsley | | ILLU–Bea |
| Illustrations — Beckhoff | | ILLU–Bec |
| Illustrations — Bemelmans | | ILLU–Bem |
| Illustrations — Benda | | ILLU–Ben |
| Illustrations — Beskow | | ILLU–Bes |
| Illustrations — Birch | | ILLU–Bir |
| Illustrations — Blake | | ILLU–Bla |
| Illustrations — Bm–Bz | | ILLU–(Bm–Bz) |
| Illustrations — Booth | | ILLU–Boo |
| Illustrations — Boutet de Monvel | ILLU–Bou |
| Illustrations — Brinkley | | ILLU–Bri |
| Illustrations — Brooke | | ILLU–Bro |
| Illustrations — C | | ILLU–(C) |
| Illustrations — Caldecott | | ILLU–Cal |
| Illustrations — Christy | | ILLU–Chr |
| Illustrations — Cooper | | ILLU–Coo |
| Illustrations — Cornwell | | ILLU–Cor |
| Illustrations — Covarrubias | | ILLU–Cov |
| Illustrations — Crane | | ILLU–Cra |
| Illustrations — Cruikshank | | ILLU–Cru |
| Illustrations — D | | ILLU–(D) |
| Illustrations — Darley | | ILLU–Dar |
| Illustrations — Dohanos | | ILLU–Doh |
| Illustrations — Dore | | ILLU–Dir |
| Illustrations — Du Bois | | ILLU–Du |
| Illustrations — Dulac | | ILLU–Dul |
| Illustrations — Du Maurier | | ILLU–Du M |
| Illustrations — E | | ILLU–(E) |
| Illustrations — Erte | | ILLU–Drt |
| Illustrations — F | | ILLU–(F) |
| Illustrations — Flagg | | ILLU–Fla |
| Illustrations — Frasconi | | ILLU–Fra |
| Illustrations — Fraser | | ILLU–Fras |
| Illustrations — Frost | | ILLU–Fro |
| Illustrations — G | | ILLU–(G) |
| Illustrations — Gibson | | ILLU–Gib |
| Illustrations — Glaser | | ILLU–Gla |
| Illustrations — Green | | ILLU–Gre |
| Illustrations — Greenaway | | ILLU–Gree |
| Illustrations — Groth | | ILLU–Gro |
| Illustrations — Guerin | | ILLU–Gue |
| Illustrations — H | | ILLU–(H) |
| Illustrations — Held | | ILLU–Hel |
| Illustrations — Hildebrandt | | ILLU–Hil |
| Illustrations — Homer | | ILLU–Hom |
| Illustrations — I–J | | ILLU–(I–J) |
| Illustrations — K | | ILLU–(K) |
| Illustrations — Kent | | ILLU–Ken |
| Illustrations — La–Ll | | ILLU–(La–Ll) |
| Illustrations — Larsson | | ILLU–Lar |
| Illustrations — Lathrop | | ILLU–Lat |
| Illustrations — Lawson | | ILLU–Law |
| Illustrations — Legrand | | ILLU–Leg |
| Illustrations — Leyendecker | | ILLU–Ley |
| Illustrations — Lm–Lz | | ILLU–(Lm–Lz) |
| Illustrations — M | | ILLU–(M) |
| Illustrations — Martin | | ILLU–Mar |
| Illustrations — Morgan | | ILLU–Mor |
| Illustrations — Mucha | | ILLU–Muc |
| Illustrations — N | | ILLU–(N) |
| Illustrations — Nielsen | | ILLU–Nie |
| Illustrations — Nurick | | ILLU–Nur |
| Illustrations — O | | ILLU–(O) |
| Illustrations — O'Neill | | ILLU–One |
| Illustrations — P | | ILLU–(P) |
| Illustrations — Parrish | | ILLU–Par |
| Illustrations — Penfield | | ILLU–Pen |
| Illustrations — Pogany | | ILLU–Pog |
| Illustrations — Preston | | ILLU–Pre |
| Illustrations — Pyle | | ILLU–PYl |
| Illustrations — Q | | ILLU–(Q) |
| Illustrations — R | | ILLU–(R) |
| Illustrations — Rackham | | ILLU–Rac |
| Illustrations — Raleigh | | ILLU–Ral |
| Illustrations — Remington | | ILLU–Rem |
| Illustrations — Robinson | | ILLU–Rob |
| Illustrations — Rockwell | | ILLU–Roc |
| Illustrations — Sa–Sl | | ILLU–(Sa–Sl) |
| Illustrations — Sarg | | ILLU–Sar |
| Illustrations — Schoonover | | ILLU–Sch |
| Illustrations — Sendak | | ILLU–Sen |
| Illustrations — Sewell | | ILLU–Sew |
| Illustrations — Shepard | | ILLU–She |
| Illustrations — Sloan | | ILLU–Sol |
| Illustrations — Sm–Sz | | ILLU–(Sm–Sz) |
| Illustrations — Smith | | ILLU–Smi |
| Illustrations — Soulen | | ILLU–So |
| Illustrations — Szyk | | ILLU–Szy |
| Illustrations — T | | ILLU–(T) |
| Illustrations — Teague | | ILLU–Tra |
| Illustrations — Tenniel | | ILLU–Ten |
| Illustrations — Timmins | | ILLU–Tim |
| Illustrations — U | | ILLU–(U) |
| Illustrations — V | | ILLU–(V) |
| Illustrations — Vertes | | ILLU–Ver |
| Illustrations — W | | ILLU–(W) |
| Illustrations — Whitcomb | | ILLU–Whi |
| Illustrations — Whitmore | | ILLU–Whit |
| Illustrations — Wilson | | ILLU–Wil |
| Illustrations — Wyeth | | ILLU–Wye |
| Illustrations — X–Z | | ILLU–(X–Z) |
| Illustrations — Zayas | | ILLU–Zay |
| Immigration | | IMM |
| Impersonators | | IMP |
| Inaugurations | | INA |
| Inaugurations — 1899 & earlier | | INA–18 |
| Incas | | INCA |
| Incense | | INCE |
| India | | IND |
| India — A–Z | | IND–(A–Z) |
| India — Assam | | IND–Ass |
| India — Benares | | IND–Ben |
| India — Fauna & flora | | IND–Fau |
| India — Goa | | IND–Goa |
| India — History | | IND–His |
| India — History–1899 & earlier | | IND–His–18 |
| India — Industries | | IND–Ind |
| India — Kashmir | | IND–Kas |
| India — Life | | IND–Lif |
| India — Life–1899 & earlier | | IND–Lif–18 |
| India — Mountains | | IND–Mou |
| India — New Delhi | | IND–New |
| India — Rivers | | IND–Riv |
| India — Taj Mahal | | IND–Taj |
| Indiana | | INDI |
| Indiana — 1899 & earlier | | INDI18– |
| Indiana — A–Z | | INDI–(A–Z) |
| Indiana — Indianapolis | | INDI–Ind |
| Indiana — Life | | INDI–Lif |
| Indians | | INDIA |
| | Aztecs | AZT |
| | Eskimos | ESK |
| | Incas | INCA |
| | Mayas | MAYA |
| Indians — Central America | | INDIA–Cen |
| Indians — Mexico | | INDIA–Mex |
| Indians — North America | | INDIA–Nor |
| Canada & the United States | | |
| | American history | AME |
| | Canada–History | CAN–His |
| | North America –1900s | Nor–19 |
| | North America –California–Intermountain | Nor–Cal |
| | North America –Eastern–Northern | Nor–Nor |
| | North America –Eastern–Northern–1500s | Nor–Nor–15 |
| | North America –Eastern–Northern–1600s | Nor–Nor–16 |
| | North America –Eastern–Northern–1700s | Nor–Nor–17 |
| | North America –Eastern–Northern–1800s | Nor–Nor–18 |
| | North America –Northwest Coast | Nor–Nor–Coa |
| | North America –Northwest Coast–1800s | Nor–Nor–Coa–18 |
| | North America –Plains | Nor–Pla |
| | North America –Plains–1800s | Nor–Pla–18 |
| | North America –Southwest–1800s | Nor–Sou–18 |
| Indians — Sculpture | | INDIA–Scu |
| Indians — South America–A–Z (Subdivided by country) | | INDIA–Sou–(A–Z) |
| Indians — South America–Argentina | INDIA–Sou–Arg |
| Indians — South America–Bolivia | | INDIA–Sou–Bol |
| Indians — South America–Brazil | | INDIA–Sou–Bra |
| Indians — South America–Ecuador | INDIA–Sou–Esu |
| Indians — South America–Peru | | INDIA–Sou–Per |
| Indians — West Indian | | INDIA–Sou–Wes |
| Indonesia | | INDO |
| Indonesia — Bali | | INDO–Bal |
| Indonesia — Celebes | | INDO–Cel |
| Indonesia — History | | INDO–His |
| Indonesia — Industries | | INDO–Ind |
| Indonesia — Java | | INDO–Jav |
| Indonesia — Life | | INDO–Lif |
| Indonesia — Moluccas | | INDO–Mol |
| Indonesia — Sumatra | | INDO–Sum |
| Industrial scenes | | INDU |
| Industry–Allegorical | | INDUS |
| Ink | | INK |
| Inkstands | | INKS |
| Inns | | INN |
| Inns — A–Z (Subdivided by country) | | INN–(A–Z) |
| Inns — England | | INN–Eng |
| Inns — France | | INN–Fra |
| Inns — Italy | | INN–Ita |
| Inns — United States | | INN–US |
| Inquisition | | INQ |
| Insecticides | | INS |
| | Advertising–Insecticides | |
| Insects | | INSE |
| | Agriculture–Pests | |
| Insects — A–F | | INSE–(A–F) |
| Insects — Ant | | INSE–Ant |
| Insects — Bee | | INSE–Bee |
| | Bee culture | |
| Insects — Beetle | | INSE–Beet |
| Insects — Bug | | INSE–Bug |
| —Order Hemiptera | INSE–Ord |
| Insects — Butterfly | | INSE–But |
| Insects — Caterpillar | | INSE–Cat |
| Insects — Cicada | | INSE–Cic |
| Insects — Cockroach | | INSE–Coc |
| Insects — Cricket | | INSE–Cri |
| Insects — Design | | INSE–Des |
| Insects — Dragonfly | | INSE–Dra |
| Insects — Eggs | | INSE–Egg |
| Insects — Firefly | | INSE–Fir |
| Insects — Flea | | INSE–Fle |
| Insects — Fly | | INSE–Fly |
| Insects — G–Q | | INSE–(G–Q) |
| Insects — Grasshopper | | INSE–Gra |
| Insects — Harmful | | INSE–Har |
| | Advertising–Insecticides | |
| | Agriculture–Pests | |
| Insects — Illustrations | | INSE–Ill |
| Insects — Katydid | | INSE–Kat |
| Insects — Locust | | INSE–Loc |
| Insects — Mantis | | INSE–Man |
| Insects — Mosquito | | INSE–Mos |
| Insects — Moth | | INSE–Mot |
| Insects — Prints | | INSE–Pri |
| Insects — R–Z | | INSE–(R–Z) |
| Insects — Termite | | INSE–Ter |
| Insects — Wasp | | INSE–Was |
| Insects — Weevil | | INSE–Wee |
| Insignia | | INSI |
| Insignia — Air force–A–Z (Subdivided by country) | | INSI–Air–(A–Z) |
| Insignia — Air force–Great Britain | INSI–Air–Gre |
| Insignia —Air force–United States | INSI–Air–US |
| Insignia — Army–A– Z (Subdivided by country) | | INSI–Arm–(A–Z) |
| Insignia — Army–United States | INSI–Arm–US |
| Insignia — Fraternal societies | | INSI–Fra |
| Insignia — Marine corps–United States | INSI–Mar |
| Insignia — Navy–A–Z (Subdivided by country) | | INSI–Nav–(A–Z) |
| Insignia — Navy–United States | INSI–Nav–US |
| Insulation | | INSUL |
| Insurance | | INSUR |
| Intelligence service | | INT |
| Interior decoration | | INTE |
| Interiors | | |
| | New York City–Interiors | New YC–Int |
| | Domestic interiors | |
| Interiors — 1901s–1910s | | INTE–19 |
| Interiors — 1920s | | INTE–192 |
| Interiors — 1930s | | INTE–193 |
| Interiors — 1940s | | INTE–194 |
| Interiors — 1950s | | INTE–195 |
| Interiors — 1960s | | INTE–196 |
| Interiors — 1970s | | INTE–197 |
| Interiors — 1980s | | INTE–198 |
| Interiors — 1990s | | INTE–199 |
| Interiors — 2001s | | INTE–200 |
| Interiors — A–L (Subdivided by country) | | INTE–(A–L) |
| Interiors — American | | INTE–Ame |
| Interiors — American–1600s | | INTE–Ame–16 |
| Interiors — American–1700s | | INTE–Ame–17 |
| Interiors — American–1800s | | INTE–Ame–18 |
| Interiors — American–1900s | | INTE–Ame–19 |
| Interiors — Southwest style | | INTE–Sou |
| Interiors — Spanish style | | INTE–Spa |
| Interiors — Ancient | | INTE–Anc |
| Interiors — Art Nouveau | | INTE–Art |
| Interiors — Austrian | | INTE–Aus |
| Interiors — Ballroom | | INTE–Bal |
| Interiors — Bathroom | | INTE–Bat |
| Interiors — Bedroom | | INTE–Bed |
| Interiors — Billiard room | | INTE–Bil |
| Interiors — Boudoir | | INTE–Bou |
| Interiors — Child's room | | INTE–Chi |
| Interiors — Den | | INTE–Den |
| Interiors — Dining room | | INTE–Din |
| Interiors — Drawing room | | INTE–Dra |
| Interiors — Dressing room | | INTE–Dre |
| Interiors — Dutch | | INTE–Dut |
| Interiors — Empire & Empire style | INTE–Emp |
| Interiors — English | | INTE–Eng |
| Interiors — English–1599 & earlier | INTE–Eng–15 |
| Interiors — English–1600s | | INTE–Eng–16 |
| Interiors — English–1700s | | INTE–Eng–17 |
| Interiors — English–1800s | | INTE–Eng–18 |
| Interiors — English–1900s | | INTE–Eng–19 |
| Interiors — Finnish | | INTE–Fin |
| Interiors — Flemish | | INTE–Fle |
| Interiors — French | | INTE–Fre |
| Interiors — French–1699 & earlier | INTE–Fre–16 |
| Interiors — French– 1700s | | INTE–Fre–17 |
| Interiors — French–1800s | | INTE–Fre–18 |
| Interiors — French–1900s | | INTE–Fre–19 |
| Interiors — Game room | | INTE–Gam |
| Interiors — German | | INTE–Ger |
| Interiors — German–1699 & earlier | INTE–Ger–16 |
| Interiors — German–1700s | | INTE–Ger–17 |
| Interiors — German–1800s | | INTE–Ger–18 |
| Interiors — German–1900s | | INTE–Ger–19 |
| Interiors — Hallway–Home | | INTE–Hal–Ho |
| Interiors — Hallway–Public (Hallways & lobbies of commercial & public buildings) | INTE–Hal–Pu |
| Interiors — Hungarian | | INTE–Hun |
| Interiors — India | | INTE–Ind |
| Interiors — Italian | | INTE–Ita |
| Interiors — Italian–1899 & earlier | INTE–Ita–18 |
| Interiors — Japanese | | INTE–Jap |
| Interiors — Library | | INTE–Lib |
| Interiors — Living room | | INTE–Liv |
| Interiors — Loft (Commercial or manufacturing spaces remodeled for living) | | INTE–Lof |
| Interiors — M–Z (Subdivided by country) | | INTE–(M–Z) |
| Interiors — Mexican | | INTE–Mex |
| Interiors — Moorish | | INTE–Moo |
| Interiors — Music room | | INTE–Mus |
| Interiors — Norwegian | | INTE–Nor |
| Interiors — Parlor | | INTE–Par |
| Interiors — Rococo | | INTE–Roc |
| Interiors — Russian | | INTE–Rus |
| Interiors — Smoking room | | INTE–Smo |
| Interiors — Spanish | | INTE–Spa |
| Interiors — Sun room | | INTE–Sun |
| Interiors — Swedish | | INTE–Swe |
| Interiors — Victorian | | INTE–Vic |
| Interviews | | INTER |
| Inventions | | INV |
| Inventions — Cartoons | | INV–Car |
| Investigations | | INVE |
| Investigations — Cartoons | | INVE–Car |
| Invitations | | INVI |
| Iowa | | IOW |
| Iowa — 1899 & earlier | | IOW–18 |
| Iowa — A–Z | | IOW–(A–Z) |
| Iowa — Des Moines | | IOW–Des |
| Iowa — Life | | IOW–Lif |
| Iran | | IRAN |
| Iran — A–Z | | IRAN–(A–Z) |
| Iran — History | | IRAN–His |
| Iran — History — 1899 & earlier | IRAN–His–18 |
| Iran — Industries | | IRAN–Ind |
| Iran — Life | | IRAN–Lif |
| Iran — Mountains | | IRAN–Mou |
| Iran — Persepolis | | IRAN–Per |
| Iran — Rivers | | IRAN–Riv |
| Iran — Tehran | | IRAN–Teh |
| Iraq | | IRAQ |
| Iraq — A–Z | | IRAQ–(A–Z) |
| Iraq — Baghdad | | IRAQ–Bag |
| Iraq — History | | IRAQ–His |
| | Persian Gulf War | PERSI |
| Ireland | | IRE |
| Ireland — A–Z | | IRE–(A–Z) |
| Ireland — Aran Islands | | IRE–Ara |
| Ireland — Belfast | | IRE–Bel |
| Ireland — Dublin | | IRE–Dub |
| Ireland — Dublin — 1899 & earlier | IRE–Dub–18 |
| Ireland — Giant's Causeway | | IRE–Gia |
| Ireland — History | | IRE–His |
| Ireland — History — 1899 & earlier | IRE–His–18 |
| Ireland — Industries | | IRE–Ind |
| Ireland — Ki1larney | | IRE–Kil |
| Ireland — Life | | IRE–Lif |
| Ireland — Life — 1899 & earlier | | IRE–Lif–18 |
| Iron & steel industry | | IRO |
| Iron & steel industry — History | | IRO–His |
| Iron & steel industry — Plants | | IRO–Pla |
| Iron & steel industry — Pouring | | IRO–Pou |
| Iron & steel industry — Products manufacture | IRO–Pro |
| Iron & steel industry — Rolling | | IRO–Rol |
| Iron & steel industry — Workers | | IRO–Wor |
| Iron ores | | IRON–Ores |
| Ironing | | IRONI |
| Irrigation | | IRR |
| Islam | | ISL |
| | Dervishes | DER |
| | Mosques | MOSQ |
| | Praying | PRAY |
| Islands | | ISLA |
| Israel | | ISR |
| Israel — A–Z | | ISR–(A–Z) |
| Israel — Haifa | | ISR–HAi |
| Israel — History | | ISR–His |
| Israel — Industries | | ISR–Ind |
| Israel — Jaffa | | ISR–Jaf |
| Israel — Jerusalem | | ISR–Jer |
| Israel — Jerusalem — 1899 & earlier | ISR–Jer–18 |
| Israel — Jerusalem — Western Wall | ISR–Jer–Wes |
| Israel — Life | | ISR–Lif |
| Israel — Nazareth | | ISR–Naz |
| Israel — Tel Aviv | | ISR–Tel |
| Israel — Tiberias | | ISR–Tib |
| Italy | | ITA |
| Italy — A–L | | ITA–(A–L) |
| Italy — Amalfi | | ITA–Ama |
| Italy — Assisi | | ITA–Ass |
| Italy — Capri | | ITA–Cap |
| Italy — Elba | | ITA–Elb |
| Italy — Florence | | ITA–Flo |
| Italy — Florence — 1899 & earlier | ITA–Flo–18 |
| Italy — Genoa | | ITA–Gen |
| Italy — Herculaneum | | ITA–Her |
| Italy — History | | ITA–His |
| Italy — History — 1899 & earlier | | ITA–His–18 |
| Italy — Industries | | ITA–Ind |
| Italy — Lakes | | ITA–Lak |
| Italy — Life | | ITA–Lif |
| Italy — Life — 1899 & earlier | | ITA–Lif–18 |
| Italy — M–Z | | ITA–(M–Z) |
| Italy — Milan | | ITA–Mil |
| Italy — Mountains | | ITA–Mou |
| Italy — Naples | | ITA–Nap |
| Italy — Naples — 1899 & earlier | | ITA–Nap–18 |
| Italy — Ostia | | ITA–Ost |
| Italy — Pisa | | ITA–Pis |
| Italy — Pompeii | | ITA–Pom |
| Italy — Rivers | | ITA–Riv |
| Italy — Riviera | | ITA–Rivi |
| Italy — Rome | | ITA–Rom |
| Italy — Rome — 1899 & earlier | | ITA–Rom–18 |
| Italy — Sardinia | | ITA–Sar |
| Italy — Sicily | | ITA–Sic |
| Italy — Sicily — A–Z | | ITA–Sic–(A–Z) |
| Italy — Sicily — Etna | | ITA–Etn |
| Italy — Sicily — Palermo | | ITA–Pal |
| Italy — Sicily — Syracuse | | ITA–Syr |
| Italy — Sicily — Taormina | | ITA–Tao |
| Italy — Tivoli | | ITA–Tiv |
| Italy — Trieste | | ITA–Tri |
| Italy — Venice | | ITA–Ven |
| Italy — Venice — 1899 & earlier | ITA–Ven–18 |
| Italy — Venice — Lido | | ITA–Ven–Lid |
| Italy — Verona | | ITA–Ver |
| Ivories | | IVO |
| Ivory | | IVOR |
| Ivory Coast | | IVORY |
| Ivory Coast — Life | | IVORY–Lif |