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Allen B. Downey

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Allen Downey is a Professor Emeritus at Olin College and the author of a series of freetextbooks related to software and data science, including Think Python, Think Bayes, and Think Complexity, which are also published by O’Reilly Media. His blog, Probably Overthinking It, features articles on Bayesian probability and statistics. He holds a Ph.D. in computer science from U.C. Berkeley, and M.S. and B.S. degrees from MIT.

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Allen B. Downey's Blog: Probably Overthinking It

Think DSP second edition

I have started work on a second edition of Think DSP! You can see the current draft here.

I started this project in part because of this announcement:

Once in a while, a few of the Scicloj friends will meet to learn about signal processing, following the Think DSP book by Allen B. Downey, and implementing things in Clojure. Our notes will be published at Clojure Civitas.

If you know some Clojure

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Allen B. Downey’s books

Average rating: 4.0 · 3,231 ratings · 387 reviews · 36 distinct works • Similar authors

	Think Python 4.12 avg rating — 1,665 ratings — 57 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Think Stats 3.64 avg rating — 466 ratings — published 2011 — 27 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Think Bayes: Bayesian Statistics in Python 3.94 avg rating — 284 ratings — published 2012 — 14 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Think Complexity: Complexity Science and Computational Modeling 3.91 avg rating — 245 ratings — published 2009 — 13 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Think Java: How to Think Like a Computer Scientist 3.91 avg rating — 170 ratings — published 2016 — 19 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Probably Overthinking It: How to Use Data to Answer Questions, Avoid Statistical Traps, and Make Better Decisions 4.23 avg rating — 84 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	The Little Book of Semaphores: The Ins and Outs of Concurrency Control and Common Mistakes 4.39 avg rating — 80 ratings — published 2009	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Think DSP: Digital Signal Processing in Python 4.02 avg rating — 44 ratings — 4 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Think Data Structures: Algorithms and Information Retrieval in Java 3.47 avg rating — 36 ratings — 8 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Think OS: A Brief Introduction to Operating Systems really liked it 4.00 avg rating — 29 ratings — published 2014 — 5 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars

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The Final Girl Support Group

by Grady Hendrix (Goodreads Author)

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Nov 16, 2025 11:23AM

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The Amazing Adventures of Kavalier & Clay

by Michael Chabon

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The Arrogant Ape: The Myth of Human Exceptionalism and Why It Matters

by Christine E. Webb

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Allen Downey wants to read Awakenings - A Leg To Stand On - The man Who Mistook His Wife For A Hat And Other Clinical Tales - Seeing Voices by Oliver Sachs	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Allen Downey is currently reading The Final Girl Support Group by Grady Hendrix (Goodreads Author)	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Allen Downey finished reading Old Man's War (Old Man's War, #1) by John Scalzi (Goodreads Author)	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Allen Downey started reading The Amazing Adventures of Kavalier & Clay by Michael Chabon	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Nov 14, 2025 07:43AM · like · preview book See a Problem? We’d love your help. Let us know what’s wrong with this preview of The Amazing Adventures of Kavalier & Clay by Michael Chabon. Problem: Details (if other): Thanks for telling us about the problem. Not the book you’re looking for? Preview — The Amazing Adventures of Kavalier & Clay by Michael Chabon <iframe sandbox id="wrongBookKindlePreviewScreen">
Allen Downey is currently reading The Arrogant Ape: The Myth of Human Exceptionalism and Why It Matters by Christine E. Webb	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Nov 14, 2025 07:42AM · like · preview book See a Problem? We’d love your help. Let us know what’s wrong with this preview of The Arrogant Ape by Christine E. Webb. Problem: Details (if other): Thanks for telling us about the problem. Not the book you’re looking for? Preview — The Arrogant Ape by Christine E. Webb <iframe sandbox id="wrongBookKindlePreviewScreen">
Allen Downey finished reading When Everyone Knows That Everyone Knows...: Common Knowledge and the Mysteries of Money, Power, and Everyday Life by Steven Pinker (Goodreads Author)	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Allen Downey finished reading A Gentleman in Moscow by Amor Towles (Goodreads Author)	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Allen Downey finished reading Four Lost Cities: A Secret History of the Urban Age by Annalee Newitz (Goodreads Author)	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Quotes by Allen B. Downey (?)

“For all live births, the mean pregnancy length is 38.6 weeks, the standard deviation is 2.7 weeks, which means we should expect deviations of 2-3 weeks to be common.”
― Allen B. Downey, Think Stats

tags: explanations-math

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