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25 Free Applied Science Books [PDF]

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Looking for applied science books? We've gathered 25 free applied science books in PDF, covering fields like engineering, medicine, computer science, agriculture, and environmental science.

Applied science takes theory and puts it to work, turning research into the tools, machines, and treatments we use every day. Written by experts in each field, these books show how scientific ideas become real solutions.

Browse the collection by field. Every book is free to read online or download as PDF.

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Engineering Books

Engineering turns scientific principles into real structures, machines, and systems. These books cover electrical, mechanical, industrial, and chemical engineering for students and professionals.

  • Fundamentals of Electrical Engineering I

    A university course in electrical engineering that builds from signals and information theory to circuits and communication systems. Clear explanations and worked problems make it a strong foundation for students.

    Don H. Johnson

    Format: PDF 278 pages 2.39 MB
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  • Basics of mechanical engineering: integrating science, technology and common sense

    An introduction to mechanical engineering that connects core theory with practical reasoning, covering statics, stresses, fluid mechanics and thermodynamics. Written for first-year students who want the fundamentals explained clearly.

    Paul D. Ronney

    Format: PDF 142 pages 4.95 MB
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  • Basic electrical engineering

    Course notes covering circuit analysis, network theorems, AC circuits, transformers and DC machines. A concise reference for students starting out in electrical engineering.

    Malla Reddy College of Engineering & Technology

    Format: PDF 110 pages 2.37 MB
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  • Introduction to Industrial Engineering

    An accessible overview of what industrial engineers do, from problem solving and systems thinking to lean operations. Short chapters make it easy to grasp the discipline's big ideas.

    Bonnie Boardman, Jane Fraser

    Format: PDF 93 pages 1.52 MB
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  • Basic Principles and Calculations in Chemical Engineering

    A practical guide to material balances and stoichiometry, the calculations at the heart of chemical engineering. Step by step strategies help students solve process problems with confidence.

    Ahmed Daham

    Format: PDF 88 pages 2.64 MB
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Medical Books

Medical science applies biology and chemistry to human health, diagnosis, and treatment. These books span semiology, pharmacology, pathology, and biochemistry.

  • Clinical Semiology

    A thorough guide to reading clinical signs and symptoms across the body's systems. Written for medical students, it links patient examination with diagnostic reasoning.

    Dorel Sâmpelean, Călin-Vasile Vlad

    Format: PDF 414 pages 3.62 MB
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  • Pharmacology

    Lecture notes covering drug actions, classes and therapeutic uses for health science students. A clear, exam-focused introduction to pharmacology.

    Teferra Abula, Srinivasa A.Rao, Amare Mengistu

    Format: PDF 211 pages 1.25 MB
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  • General Pathology

    An introduction to disease processes, from cell injury and inflammation to healing and neoplasia. Structured lecture notes built for health science students.

    Mesele Bezabeh, Abiye Tesfaye, Bahiru Ergicho

    Format: PDF 261 pages 0.72 MB
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  • Medical Biochemistry

    Covers the biochemistry that underpins medicine, from metabolism to the molecular processes of health and disease. A focused resource for health science students.

    Solomon Adugna, Lakshmi Ahuja Mekonnen Alemu, Tsehayneh

    Format: PDF 264 pages 2.42 MB
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  • General surgery and semiology

    A concise lecture support on surgical basics, including antisepsis, hemorrhage, anesthesia and perioperative care. A practical starting point for medical students entering surgery.

    E.Guţu, D.Casian, V.Iacub, V.Culiuc

    Format: PDF 85 pages 0.53 MB
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Computer Science Books

Computer science drives the technology behind modern software and communication. These books introduce core theory, mathematics, and problem solving in computing.

  • Computer Science I

    A full introductory course in computer science and programming, released under an open license. Clear writing and plenty of examples guide beginners through the core concepts.

    Chris Bourke

    Format: PDF 647 pages 2.19 MB
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  • Introduction to theoretical computer science

    A modern textbook on computation, from finite automata to complexity and cryptography. Rigorous yet readable, it suits students ready for the theory behind computing.

    Boaz Barak

    Format: PDF 650 pages 6.5 MB
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  • Introduction to Computer Science

    Annotated slides covering algorithms, discrete mathematics, number systems and Boolean logic. A structured overview for students beginning computer science.

    Jurgen Schonwalder

    Format: PDF 255 pages 1.22 MB
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  • Mathematics for Computer Science

    The MIT reference on the mathematics behind computing, covering proofs, logic, graph theory and probability. Comprehensive and widely used in university courses.

    Eric Lehman, F Thomson Leighton, Albert R Meyer

    Format: PDF 1048 pages 6.35 MB
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Architecture Books

Architecture blends applied science and design to shape the spaces we live in. These books cover landscape design, interior design, and architectural photography.

  • What is landscape architecture?

    A research report exploring how experts and the public understand landscape architecture. It clarifies the profession's role in shaping built and natural environments.

    Rose Hendricks, Leann Down, Marisa Gerstein Pineau

    Format: PDF 53 pages 0.28 MB
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  • Architectural representation and meaning: Towards a theory of interpretation

    A thesis on how architecture communicates meaning, drawing on semiotics and theories of interpretation. Thoughtful reading for students interested in architectural theory.

    Amer A. Moustafa

    Format: PDF 87 pages 4.4 MB
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  • Interior Design 101

    A short, friendly introduction to the elements and principles of interior design, from line and form to color and texture. A quick primer for anyone curious about designing spaces.

    Erica Swanson Design

    Format: PDF 42 pages 1.22 MB
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  • Architectural Photography

    A practical guide to photographing buildings, covering equipment, interior and exterior work, and the challenges unique to architecture. Illustrated with examples throughout.

    Helenus Kruger

    Format: PDF 76 pages 5.49 MB
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Agriculture Books

Agriculture applies science to grow food and manage natural resources. These books cover basic farming, organic methods, and the future of food production.

  • Farmer’s Handbook on Basic Agriculture

    A practical handbook on scientific farming, covering crops, soil, water and livestock. Written to put technical agricultural knowledge in the hands of farmers.

    . P. Chandra Shekara, N. Balasubramani, Rajeev Sharma

    Format: PDF 154 pages 3.42 MB
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  • The future of food and agriculture

    A report from the Food and Agriculture Organization mapping the trends and challenges shaping global food systems. A data-rich look at how agriculture must adapt to feed a growing world.

    Food and Agriculture Organization of the United Nations

    Format: PDF 180 pages 6.23 MB
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  • Training manual for organic agriculture

    A hands-on manual of organic farming technologies and practices for smallholder farmers. Full of practical methods for soil health, pest control and sustainable production.

    Nadia Scialabba

    Format: PDF 105 pages 7.46 MB
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  • Basic Agriculture

    A student handbook introducing the fundamentals of agriculture, from crops and soil to animal rearing. Clear and well organized for learners new to the field.

    Shiksha Kendra

    Format: PDF 208 pages 5.08 MB
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Environmental Science Books

Environmental science studies how human activity shapes the natural world. These books cover ecology, sustainability, and the science behind protecting our environment.

  • Introduction to Environmental Science

    A clear introduction to how natural systems work and how human activity reshapes them, covering ecology, biodiversity, energy, pollution and climate. Built as a college course, it ties scientific principles to real environmental challenges.

    Caralyn Zehnder, Kalina Manoylov, Samuel Mutiti, Christine Mutiti, Allison VandeVoort, Donna Bennett

    Format: PDF 161 pages 24.53 MB
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  • Environmental Biology

    An introductory environmental science course told from a biological angle, spanning ecosystems, populations, biodiversity and the human impact on the natural world. Well organized and accessible for readers new to the subject.

    Matthew R. Fisher

    Format: PDF 343 pages 8.89 MB
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  • Introduction to Environmental Sciences and Sustainability

    A comprehensive look at environmental science with sustainability at its core, spanning ecology, pollution, climate change, food production and resource management. It pairs the science with practical approaches for a more sustainable future.

    Emily P. Harris

    Format: PDF 408 pages 10.42 MB
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  • AP Environmental Science

    A concise resource covering the core topics of environmental science, from ecosystems and energy flow to pollution, resource use and policy. A focused option for readers who want the essentials in one place.

    LibreTexts

    Format: PDF 99 pages 2.57 MB
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These books show applied science in action across engineering, medicine, computing, and the environment. Pick a field and start reading today.

Want to explore more? Browse our full collection of Science books in PDF.

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