| Call number | Item |
| Q | Science (Go to start of category) |
| QA | Mathematics and Computer Science (Go to start of category) |
| QA39.2 .T413 | ![[Info]](https://onlinebooks.library.upenn.edu/info.gif) Practical Foundations of Mathematics, by Paul Taylor (HTML with commentary at paultaylor.eu) |
| QA39.3 .B67 | The Essence of Mathematics Through Elementary Problems (Cambridge, UK: Open Book Publishers, c2019), by Alexandre Borovik and A. Gardiner (multiple formats with commentary at Open Book Publishers) |
| QA39.3 .F54 2010 | A Gentle Introduction to the Art of Mathematics (electronic edition, c2010), by Joseph E. Fields (PDF with commentary at southernct.edu) |
| QA39.3 .L48 2020 | Discrete Mathematics: An Open Introduction (third edition, 2020), by Oscar Levin (illustrated HTML and PDF with commentary at openmathbooks.org) |
| QA42 .K59 1989 | Mathematical Writing (text only, no figures; link to full text in "Errata" section), by Donald Ervin Knuth, Tracy Larrabee, and Paul M. Roberts (gzipped TeX with commentary at Stanford) |
| QA43 .S55 2019 | Advanced Problems in Mathematics: Preparing for University (new revised edition; Cambridge, UK: Open Book Publishers, 2019), by S. T. C. Siklos (multiple formats with commentary at Open Book Publishers) |
| QA43 .S63 1991 | Only Problems, Not Solutions! (fourth edition, c1993), by Florentin Smarandache (PDF at UNM) |
| QA43 .U5 | A Collection of Mathematical Problems (New York and London: Interscience Publishers, ca. 1960), by Stanislaw M. Ulam (page images at HathiTrust) |
| QA47 .A161 | Handbook of Mathematical Functions, With Formulas, Graphs, and Mathematical Tables (10th printing, with corrections, 1972), ed. by Milton Abramowitz and Irene A. Stegun (page images at sfu.ca) |
| QA63 .C65 2011 | Precalculus (electronic edition, c2011), by David H. Collingwood, K. David Prince, and Matthew M. Conroy (PDF with commentary at Washington) |
| QA63 .M34 2010 | Street-Fighting Mathematics: The Art of Educated Guessing and Opportunistic Problem Solving (Cambridge, MA and London: MIT Press, c2010), by Sanjoy Mahajan (PDF with commentary at MIT Press) |
| QA63 .W55 | Algorithms and Complexity (first edition, 1994), by Herbert S. Wilf (PDF with commentary here at Penn) |
| QA66 .I8 M8 | Cenni Storici sui Lavori Geodetici e Topografici e Sulle Principali Produzioni Cartografiche Eseguite in Italia dalla Metà del Secolo XVIII ai Nostri Giorni (in Italian; Florence: Coi tipi dell' Istituto Geografico Militare, 1903), by Attilio Mori |
| QA71 .H81 | Modern Instruments and Methods of Calculation, ed. by E. M. Horsburgh (page images at Cornell) |
| QA71 .T68 2013 | Elementary Differential Equations (free online edition, 2013), by William F. Trench (PDF and LaTeX at trinity.edu) |
| QA71 .T681 2013 | Student Solutions Manual for Elementary Differential Equations and Elementary Differential Equations With Boundary Value Problems (free online edition, originally published 2000), by William F. Trench (PDF at trinity.edu) |
| QA75 .B12 | A Letter to Sir Humphry Davy, Bart., President of the Royal Society, etc., etc., on the Application of Machinery to the Purpose of Calculating and Printing Mathematical Tables (London: J. Booth; and Baldwin, Cradock and Joy, 1822), by Charles Babbage |
| QA75 .B4 | Giant Brains: or, Machines That Think (c1949), by Edmund Callis Berkeley (page images at HathiTrust) |
| QA75 .B44 | Tyniacs: Tiny Electric Brain Machines, and How to Make Them; Also, Manual for Tyniac Electric Construction Kit (K2) (New York: Berkeley Enterprises, 1956), by Edmund Callis Berkeley (page images at HathiTrust) |
| QA75.5 | Journal of the Brazilian Computer Society (partial serial archives) |
| QA75.5 | Theory of Computing (2005-) (full serial archives) |
| QA75.5 .B66 | Maximum PC (partial serial archives) |
| QA75.5 .C587 | Compute! (partial serial archives) |
| QA76.A1 C5951 1968 | Software Engineering: Report of a Conference Sponsored by the NATO Science Committee, Garmisch, Germany, 7th to 11th October 1968 (originally published 1969), ed. by Peter Naur and Brian Randell (PDF in the UK) |
| QA76 .A334 1994 | Foundations of Computer Science (C edition, ca. 1994), by Alfred V. Aho and Jeffrey D. Ullman (PDF files with commentary at Stanford) |