Action Comics #1, 6/38, DC (1st Superman and Lois Lane)

Funny Pages #V2#10, 9/38, Centaur (1st Arrow, 1st costumed hero)

Jumbo Comics #1, 9/38, Fiction House (1st Sheena, 1st Fiction House comic book)

Motion Picture Funnies Weekly #1, 1939, First Funnies Inc. (1st printed app. Sub-Mariner)

Movie Comics #1, 4/39, DC (1st movie comic)

New York World's Fair 1939, 4/39, DC (1st published Sandman story)

Detective Comics #27, 5/39, DC (1st Batman)

Wonder Comics #1, 5/39, Fox (1st Wonderman, 1st Superman imitator)

Superman (#1), Summer/39, DC (1st issue, 1st hero to get his own book)

Adventure Comics #40, 7/39, DC (1st conceived Sandman story)

Marvel Comics #1, 10/39, Timely (1st newsstand Sub-Mariner, 1st Human Torch, 1st Marvel comic)

Silver Streak #1, 12/39, Lev Gleason (1st Gleason comic book, 1st Claw)

Flash Comics #1, 1/40, DC (1st Flash, Hawkman, & Johnny Thunder)

Pep Comics #1, 1/40, MLJ/Archie (1st app. Shield, 1st patriotic hero)

Planet Comics #1, 1/40, Fiction House (1st all science fiction comic book)

More Fun Comics #52, 2/40, DC (1st Spectre)

Whiz Comics #2 (#1), 2/40, Fawcett (1st Captain Marvel & Spy Smasher, 1st Fawcett comic book)

Adventure Comics #48, 3/40, DC (1st Hourman)

More Fun Comics #53, 3/40, DC (Part II of 1st Spectre story)

Four Color Ser. 1 #4 (Donald Duck), 3/40, (1st four color Donald Duck)

Action Comics #23, 4/40, DC (1st Lex Luthor)

Detective Comics #38, 4/40, DC (1st Robin)

Batman #1, Spring/40, DC (1st issue of DC's 2nd most important character; 1st 2 Joker stories; 1st Catwoman)

More Fun Comics #55, 5/40, DC (1st Dr. Fate)

The Spirit #1, 6/2/40, Will Eisner (1st Spirit app. in weekly newspaper strip)

All American Comics #16, 7/40, DC (1st Green Lantern)

Blue Bolt #3, 7/40, Fox (1st Simon & Kirby story art)

Marvel Mystery Comics #9, 7/40, Timely (1st superhero battle; key battle issue)

Red Raven #1, 8/40, Timely (Early Kirby art)

Special Edition Comics #1, 8/40, Fawcett (1st comic book devoted to Captain Marvel)

Silver Streak #6, 9/40, Lev Gleason (1st Daredevil)

Batman #3, Fall/40, DC (1st Catwoman in costume)

Human Torch #2 (#1), Fall/40, Timely (1st issue of early Marvel star)

Walt Disney's Comics & Stories #1, 10/40, Dell (1st funny animal comic book series)

All American Comics #19, 10/40, DC (1st Atom)

All Star Comics #3, Winter/40-41, DC (1st superhero group)

Adventure Comics #72, 3/41, DC (1st Simon & Kirby Sandman)

Captain America Comics #1, 3/41, Timely (1st Captain America)

Captain Marvel Adventures #1, 3/41, Fawcett (1st issue of Fawcett's top character)

Sub-Mariner Comics #1, Spring/41, Timely (1st issue of Marvel's important character)

Adventure Comics #61, 4/41, DC (1st Starman)

All Flash #1, Summer/41, DC (1st issue of top DC character)

Daredevil #1, 7/41, Lev Gleason (1st issue of top character)

Military Comics #1, 8/41, Quality (1st Blackhawk)

Famous Funnies #100, 10/41, Eastern (1st comic book to reach issue #100)

Green Lantern #1, Fall/41, DC (1st issue of top DC character)

Looney Tunes #1, Fall/41, Dell (1st Bugs Bunny, Porky Pig & Elmer Fudd in comics)

More Fun Comics #73, 11/41, DC (1st Aquaman; 1st Green Arrow and Speedy)

Pep Comics #22, 12/41, MLJ/Archie (1st Archie)

Whiz Comics #25, 12/41, Fawcett (1st Captain Marvel Jr.)

Four Color Ser. 1 (Mickey Mouse) #16, 1941, (1st comic book devoted to Mickey Mouse)

All Star Comics #8, 12-1/41-42, DC (1st Wonder Woman)

Animal Comics #1, 12-1/41-42, Dell (1st Pogo by Walt Kelly)

Sensation Comics #1, 1/42, DC (1st series to star Wonder Woman)

Crime Does Not Pay #22, 6/42, Gleason (1st Crime comic series)

Sensation #6, June, 1942, DC, (1st app. Wonder Woman's magic lasso)

Wonder Woman #1, Summer/42, DC (1st issue of top DC character)

Four Color (Donald Duck) #9, 8/42 Dell (1st Barks work on Donald Duck)

Air Fighters Comics V1 #3, 12/42, Hillman, (1st app. of the Heap, 1st swamp creature in comics)

Archie Comics #1, Winter/42-43, MLJ/ Archie, (1st Teenage comic)

Capt Marvel Adventures #22, 3/43, Fawcett, (Begins Mr. Mind serial)

Plastic Man #1, Summer/43, Quality (1st issue of top Quality character)

Big All-American Comic Book #1, 1944, DC, (1st annual of All-American Comics)

More Fun Comics #101, 1/2/45, DC (1st Superboy)

Molly O'Day #1, 2/45, Avon (1st Avon comic)

Terry-Toons Comics #38, 11/45, Timely (1st Mighty Mouse)