#  Harry R. Lewis 

 



 

I am a member of [Harvard's Theory of Computation group](http://toc.seas.harvard.edu/), and of the board of directors of the Electronic Privacy Information Center ([EPIC](https://www.epic.org/)).

Email me at LEWIS "AT" HARVARD "DOT" EDU (only I read this)  
Personal email to HARRYROYLEWIS "AT" GMAIL "DOT" COM (only I read this)



 



      ![portrait](/sites/g/files/omnuum4286/files/styles/hwp_1_1__480x480/public/harrylewis/files/portrait.jpg?h=8269f3c8&itok=7J3VUNZC) 

 

 

  

 



 

 

 

   ![Cover of "Leibniz on Binary"](/sites/g/files/omnuum4286/files/styles/hwp_1_1__360x360_scale/public/harrylewis/files/leibniz_on_binary_cover.png?itok=M-ng3v_Q) 

 



 

 

   ![Cover of Blown to Bits, 2nd edition](/sites/g/files/omnuum4286/files/styles/hwp_1_1__360x360_scale/public/harrylewis/files/b2b2_cover.jpg?itok=hsNR9vkB) 

 



 

 [### Blown to Bits

 ](https://www.amazon.com/gp/product/0134850017?pf_rd_r=PYZY1E20VSD9K49KR314&pf_rd_p=edaba0ee-c2fe-4124-9f5d-b31d6b1bfbee) 

 

   ![Ideas That Created the Future cover](/sites/g/files/omnuum4286/files/styles/hwp_1_1__360x360_scale/public/harrylewis/files/itctf_cover.png?itok=vAmuw6iV) 

 



 

 [### Ideas That Created The Future

 ](https://www.amazon.com/Ideas-That-Created-Future-Computer/dp/0262045303/ref=sr_1_1?dchild=1&keywords=lewis+ideas+that+created+the+future&qid=1595538528&s=books&sr=1-1) 

 

   ![book](/sites/g/files/omnuum4286/files/styles/hwp_1_1__360x360_scale/public/2024-11/51dizmb1HVL._SX398_BO1%2C204%2C203%2C200_.jpg?itok=ks3N7uUr) 

 



 

 [### Essential Discrete Mathematics for Computer Science

 ](https://press.princeton.edu/books/hardcover/9780691179292/essential-discrete-mathematics-for-computer-science) 

 

   ![Elements cover](/sites/g/files/omnuum4286/files/styles/hwp_1_1__360x360_scale/public/harrylewis/files/elements_cover_j.jpg?itok=LS265iUF) 

 



 

 [### Essential Discrete Mathematics for Computer Science

 ](https://press.princeton.edu/books/hardcover/9780691179292/essential-discrete-mathematics-for-computer-science) 

 

 

 

 

 

 

[Leibniz on Binary](https://www.amazon.com/Leibniz-Binary-Invention-Computer-Arithmetic/dp/0262544342/ref=sr_1_1?crid=2RK0MSZE0QU2W&keywords=Leibniz%20on%20binary&qid=1662071905&s=books&sprefix=leibniz%20on%20binary,stripbooks,146&sr=1-1), [Errata](/errata-leibniz-binary "Errata and Reviews - Leibniz on Binary") and Reviews  
The definitive edition and translation of 32 of Leibniz's works on binary arithmetic. He works out all the arithmetic operations, and realizes that base-16 would be a more usable notation, so invents several different notations for what we now call the hexadecimal digits![Blown to Bits, Second Edition](https://www.amazon.com/gp/product/0134850017?pf_rd_r=PYZY1E20VSD9K49KR314&pf_rd_p=edaba0ee-c2fe-4124-9f5d-b31d6b1bfbee)

[Ideas That Created the Future](https://www.amazon.com/Ideas-That-Created-Future-Computer/dp/0262045303/ref=sr_1_1?dchild=1&keywords=lewis%20ideas%20that%20created%20the%20future&qid=1595538528&s=books&sr=1-1), [Errata](/errata-ideas-created-future)

[Essential Discrete Mathematics for Computer Science](https://press.princeton.edu/titles/13651.html), [Reviews and Errata](/reviews-and-errata-lewiszax-essential-discrete-mathematics-computer-science)

[Elements of the Theory of Computation (2nd edition)](https://www.u-cursos.cl/ingenieria/2010/2/CC3102/1/material_docente/bajar?id=322214), with Christos Papadimitriou

[Excellence Without a Soul ](http://www.amazon.com/Excellence-Without-Soul-Liberal-Education/dp/1586485016/ref=pd_bbs_sr_1/102-7252876-7976958?ie=UTF8&s=books&qid=1188765725&sr=8-1)-- [Hong Kong Lectures](http://www.paddyfield.com.hk/features/book.php?bg=http://www.paddyfield.com.hk/chameleon/cpbg.gif&isbn=9789881862334&topbar=000099) --[Baseball as a Second Language](http://www.lulu.com/shop/harry-lewis/baseball-as-a-second-language/paperback/product-20137143.html)

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[Op-Eds, Newsletters, and Committee Reports](/pages/harvard-committee-reports-pastorals-and-polemics "Harvard Committee Reports, Pastorals, and Polemics")

[Talks at Morning Prayers](/pages/morning-prayers "Morning Prayers")

[Committees and Boards](/pages/committees-and-boards "Committees and Boards")

[PhDs](/pages/phds-i-have-directed "PhDs I have Directed") I have supervised.

[A list of my teaching fellows, with some notes about courses I have taught](/pages/teaching-fellows "A list of my teaching fellows, with some notes about courses I have taught")

A few [articles written about me](/pages/few-things-were-written-end-my-deanship "A few things that were written at the end of my deanship") at the end of my deanship.

[Biography](/bio "Harry Lewis - Brief Biography")

A few [personal details](/pages/few-personal-details "A Few Personal Details") about me and my family.