The Chicago Manual of Style
@chicagomanual.bsky.social
The venerable, time-tested guide to style, usage, and grammar. An indispensable reference, informing the editorial canon with sound, definitive advice at cmos.style/ONLINE. We answer your “Chicago Style” questions at cmos.style/QandA.
Q. Why doesn’t “post-traumatic stress disorder” have an en dash?
Q. Neither I/me nor my dog responded. “I” or “me”?
Q. What’s the best way to style “the f-word”?
We answer these and other questions about Chicago style in the November Q&A at CMOS Online. cmos.style/QandA
Q. Neither I/me nor my dog responded. “I” or “me”?
Q. What’s the best way to style “the f-word”?
We answer these and other questions about Chicago style in the November Q&A at CMOS Online. cmos.style/QandA
November 4, 2025 at 6:00 PM
Q. Why doesn’t “post-traumatic stress disorder” have an en dash?
Q. Neither I/me nor my dog responded. “I” or “me”?
Q. What’s the best way to style “the f-word”?
We answer these and other questions about Chicago style in the November Q&A at CMOS Online. cmos.style/QandA
Q. Neither I/me nor my dog responded. “I” or “me”?
Q. What’s the best way to style “the f-word”?
We answer these and other questions about Chicago style in the November Q&A at CMOS Online. cmos.style/QandA
Q. Should “little blue heron” be capitalized?
Q. Should it be “sample A” or “Sample A”?
Q. How would you style the title of a playlist?
We answer these and other questions about Chicago style in the October Q&A at CMOS Online. cmos.style/QandA
Q. Should it be “sample A” or “Sample A”?
Q. How would you style the title of a playlist?
We answer these and other questions about Chicago style in the October Q&A at CMOS Online. cmos.style/QandA
October 7, 2025 at 8:09 PM
Q. Should “little blue heron” be capitalized?
Q. Should it be “sample A” or “Sample A”?
Q. How would you style the title of a playlist?
We answer these and other questions about Chicago style in the October Q&A at CMOS Online. cmos.style/QandA
Q. Should it be “sample A” or “Sample A”?
Q. How would you style the title of a playlist?
We answer these and other questions about Chicago style in the October Q&A at CMOS Online. cmos.style/QandA
Q. Can the first defined use of an abbreviation be plural?
Q. Does “painters tape” need an apostrophe?
Q. How do you cite a book that has a typo on the title page?
We answer these and other questions about Chicago style in the August Q&A at CMOS Online. cmos.style/QandA
Q. Does “painters tape” need an apostrophe?
Q. How do you cite a book that has a typo on the title page?
We answer these and other questions about Chicago style in the August Q&A at CMOS Online. cmos.style/QandA
August 5, 2025 at 4:01 PM
Q. Can the first defined use of an abbreviation be plural?
Q. Does “painters tape” need an apostrophe?
Q. How do you cite a book that has a typo on the title page?
We answer these and other questions about Chicago style in the August Q&A at CMOS Online. cmos.style/QandA
Q. Does “painters tape” need an apostrophe?
Q. How do you cite a book that has a typo on the title page?
We answer these and other questions about Chicago style in the August Q&A at CMOS Online. cmos.style/QandA
Q. Should “Fortune” be in italics in “Fortune 500”?
Q. Is a comma needed after a word like “yesterday”?
Q. Does a term following “called” need to be in italics?
We answer these and other questions about Chicago style in the July Q&A at CMOS Online. cmos.style/QandA
Q. Is a comma needed after a word like “yesterday”?
Q. Does a term following “called” need to be in italics?
We answer these and other questions about Chicago style in the July Q&A at CMOS Online. cmos.style/QandA
July 1, 2025 at 5:09 PM
Q. Should “Fortune” be in italics in “Fortune 500”?
Q. Is a comma needed after a word like “yesterday”?
Q. Does a term following “called” need to be in italics?
We answer these and other questions about Chicago style in the July Q&A at CMOS Online. cmos.style/QandA
Q. Is a comma needed after a word like “yesterday”?
Q. Does a term following “called” need to be in italics?
We answer these and other questions about Chicago style in the July Q&A at CMOS Online. cmos.style/QandA
Q. Should a unit with a fraction like “1/4” be singular or plural?
Q. How would Chicago style the AI company name “io”?
Q. Why is “due process clause” lowercase in Chicago style?
We answer these and other questions about Chicago style in the June Q&A at CMOS Online. cmos.style/QandA
Q. How would Chicago style the AI company name “io”?
Q. Why is “due process clause” lowercase in Chicago style?
We answer these and other questions about Chicago style in the June Q&A at CMOS Online. cmos.style/QandA
June 3, 2025 at 5:01 PM
Q. Should a unit with a fraction like “1/4” be singular or plural?
Q. How would Chicago style the AI company name “io”?
Q. Why is “due process clause” lowercase in Chicago style?
We answer these and other questions about Chicago style in the June Q&A at CMOS Online. cmos.style/QandA
Q. How would Chicago style the AI company name “io”?
Q. Why is “due process clause” lowercase in Chicago style?
We answer these and other questions about Chicago style in the June Q&A at CMOS Online. cmos.style/QandA
Q. Should Winston-Salem be spelled with an en dash?
Q. Is it “dogs have a tail” or “dogs have tails”?
Q. Why is Southern California capped but not western Arizona?
We answer these and other questions about Chicago style in the May Q&A at CMOS Online. cmos.style/QandA
Q. Is it “dogs have a tail” or “dogs have tails”?
Q. Why is Southern California capped but not western Arizona?
We answer these and other questions about Chicago style in the May Q&A at CMOS Online. cmos.style/QandA
May 6, 2025 at 5:20 PM
Q. Should Winston-Salem be spelled with an en dash?
Q. Is it “dogs have a tail” or “dogs have tails”?
Q. Why is Southern California capped but not western Arizona?
We answer these and other questions about Chicago style in the May Q&A at CMOS Online. cmos.style/QandA
Q. Is it “dogs have a tail” or “dogs have tails”?
Q. Why is Southern California capped but not western Arizona?
We answer these and other questions about Chicago style in the May Q&A at CMOS Online. cmos.style/QandA
Q. Can you omit a person’s middle initial in running text?
Q. Should the word “than” be capitalized in a title?
Q. Can “et al.” stand for just one person?
We answer these and other questions about Chicago style in the April Q&A at CMOS Online. cmos.style/QandA
Q. Should the word “than” be capitalized in a title?
Q. Can “et al.” stand for just one person?
We answer these and other questions about Chicago style in the April Q&A at CMOS Online. cmos.style/QandA
April 1, 2025 at 7:23 PM
Q. Can you omit a person’s middle initial in running text?
Q. Should the word “than” be capitalized in a title?
Q. Can “et al.” stand for just one person?
We answer these and other questions about Chicago style in the April Q&A at CMOS Online. cmos.style/QandA
Q. Should the word “than” be capitalized in a title?
Q. Can “et al.” stand for just one person?
We answer these and other questions about Chicago style in the April Q&A at CMOS Online. cmos.style/QandA
Q. Do you have any guidance on the recent name changes for the Gulf of Mexico and Denali?
Q. How would I spell out numbers to the right of the decimal point?
We answer these and other questions about Chicago style in the February Q&A at CMOS Online. cmos.style/QandA
Q. How would I spell out numbers to the right of the decimal point?
We answer these and other questions about Chicago style in the February Q&A at CMOS Online. cmos.style/QandA
February 4, 2025 at 6:48 PM
Q. Do you have any guidance on the recent name changes for the Gulf of Mexico and Denali?
Q. How would I spell out numbers to the right of the decimal point?
We answer these and other questions about Chicago style in the February Q&A at CMOS Online. cmos.style/QandA
Q. How would I spell out numbers to the right of the decimal point?
We answer these and other questions about Chicago style in the February Q&A at CMOS Online. cmos.style/QandA
Q. Can I change “%” to “percent” in quoted text?
Q. Is it wrong to put a space before a question mark?
Q. How would I include an ISBN in a source citation for a book?
We answer these and other questions about Chicago style in the January Q&A at CMOS Online.
Check it out at cmos.style/QandA
Q. Is it wrong to put a space before a question mark?
Q. How would I include an ISBN in a source citation for a book?
We answer these and other questions about Chicago style in the January Q&A at CMOS Online.
Check it out at cmos.style/QandA
January 8, 2025 at 8:10 PM
Q. Can I change “%” to “percent” in quoted text?
Q. Is it wrong to put a space before a question mark?
Q. How would I include an ISBN in a source citation for a book?
We answer these and other questions about Chicago style in the January Q&A at CMOS Online.
Check it out at cmos.style/QandA
Q. Is it wrong to put a space before a question mark?
Q. How would I include an ISBN in a source citation for a book?
We answer these and other questions about Chicago style in the January Q&A at CMOS Online.
Check it out at cmos.style/QandA