Drishti IAS Science and Technology Notes 2025-26

Product Overview

Complete Booklet Catalog

This 2-booklet set from Drishti IAS covers the entire सामान्य विज्ञान एवं विज्ञान प्रौद्योगिकी (General Science and Science & Technology) syllabus as prescribed for UPSC Civil Services Examination GS Paper III. Designed specifically for Hindi medium aspirants preparing for UPSC Mains and Prelims, each booklet addresses a distinct thematic area, ensuring structured and focused preparation from foundational science to cutting-edge technology policy.

• Booklet 1: सामान्य विज्ञान (General Science — Foundations) — Covers basic physics principles, laws of motion, thermodynamics, optics, electricity and magnetism. Includes fundamental chemistry — periodic table, chemical bonding, acids, bases, salts, and important reactions. Covers basic biology — cell structure, genetics, human physiology, plant biology. All topics mapped to UPSC Prelims GS Paper I science questions and GS Paper III foundational requirements.
• Booklet 2: विज्ञान एवं प्रौद्योगिकी — I (Science & Technology — Part I) — Covers space technology including ISRO missions, satellites, launch vehicles, and planetary exploration. Includes nuclear technology, nuclear reactors, nuclear policy, and India’s three-stage nuclear programme. Covers defence technology — missile systems, DRDO projects, indigenization, and strategic technology developments. Mapped directly to UPSC GS Paper III science and technology section.
• Booklet 3: विज्ञान एवं प्रौद्योगिकी — II (Science & Technology — Part II) — Covers biotechnology including recombinant DNA, GMOs, CRISPR, stem cell research, and biopharmaceuticals. Includes information technology — artificial intelligence, machine learning, blockchain, cybersecurity, and India’s digital policy framework. Covers nanotechnology, quantum computing, and emerging technologies with India’s strategic and policy context for UPSC GS Paper III.
• Booklet 4: विज्ञान प्रौद्योगिकी नीति एवं करेंट अफेयर्स (Science Technology Policy and Current Affairs) — Covers India’s science and technology policy framework, national missions, government schemes related to science, innovation ecosystem, and intellectual property rights. Includes current affairs in science and technology updated for UPSC 2025-26 syllabus, covering recent developments in health technology, agricultural technology, environment science, and India’s global technology partnerships.

In-Depth Content Breakdown: Booklet by Booklet

Booklet 1: सामान्य विज्ञान (General Science — Foundations)

This booklet forms the scientific bedrock for UPSC aspirants preparing through Hindi medium. It covers fundamental physics — Newton’s laws, thermodynamic principles, electromagnetic induction, and wave optics — all explained in naturally written Hindi rather than clunky translated language. Basic chemistry topics include atomic structure, chemical periodicity, organic reactions, and industrial chemistry processes. Biology sections cover cell biology, heredity and evolution, human body systems, and plant physiology. Every topic is tied back to UPSC Prelims GS Paper I question patterns from previous years, making revision targeted and effective.

What distinguishes this Drishti IAS booklet is the presentation style — complex scientific concepts are broken down using Hindi-language mnemonics, comparison tables, and simplified diagrams that Hindi medium students find far more accessible than English-translated alternatives. Important UPSC Prelims science questions from the last ten years have been analysed and incorporated as worked examples throughout the text. Margin notes flag high-frequency UPSC topics, and boxed summaries at chapter ends allow rapid last-minute revision. Students preparing for BPSC, UPPSC, and MPPSC will also find this booklet’s coverage directly applicable to their respective state PSC science sections.

Booklet 2: विज्ञान एवं प्रौद्योगिकी — I (Science & Technology — Part I)

This booklet dives deep into the technology-heavy domains that UPSC GS Paper III consistently tests. Space technology receives extensive treatment — ISRO’s entire launch vehicle family (PSLV, GSLV, LVM3), recent missions including Chandrayaan-3, Aditya-L1, and Gaganyaan, satellite applications in communication, navigation (NavIC), and remote sensing are all covered with mission-specific data and strategic importance. India’s space policy and the role of NSIL and IN-SPACe in commercialising space are explained in clear policy language suited to Mains answer writing.

Nuclear technology is another major focus — India’s three-stage nuclear power programme, pressurised heavy water reactors, fast breeder reactors, and the thorium fuel cycle are explained with sufficient technical depth for UPSC Mains yet in approachable Hindi prose. Defence technology covers India’s missile arsenal (Agni, Prithvi, BrahMos, Prahar), DRDO’s major project successes, indigenisation targets under Aatmanirbhar Bharat, and recent developments in hypersonic technology. Comparison tables between Indian and global capabilities appear throughout, helping students contextualise India’s technological position for both Prelims MCQs and Mains descriptive answers.

Booklet 3: विज्ञान एवं प्रौद्योगिकी — II (Science & Technology — Part II)

Biotechnology is treated with the rigour UPSC demands — recombinant DNA technology, polymerase chain reaction, gene editing with CRISPR-Cas9, stem cell applications, cloning ethics, and transgenic organisms are all covered. India’s biotechnology policy, the role of DBT (Department of Biotechnology), and major Indian biotech achievements like indigenously developed vaccines (Covaxin, Corbevax) are discussed with Mains-answer writing framework in mind. Agricultural biotechnology — Bt crops, herbicide tolerance, and the GM crops controversy — is presented with both scientific facts and the policy debate dimension that UPSC Mains evaluators reward.

Information technology topics are handled with clear, current language — artificial intelligence and machine learning fundamentals, deep learning applications, India’s National AI Strategy, blockchain technology and its governance applications, cybersecurity threats and India’s cyber policy, and data protection frameworks. Nanotechnology applications in medicine, materials science, and defence are explained alongside India’s Nano Mission. Quantum computing and quantum communication are introduced at the conceptual level appropriate for UPSC. Each technology topic concludes with a policy implication section — directly addressing what UPSC Mains GS Paper III questions demand in terms of governance and strategic affairs angles.

Booklet 4: विज्ञान प्रौद्योगिकी नीति एवं करेंट अफेयर्स (Science Technology Policy and Current Affairs)

The final booklet addresses the policy and current affairs dimension of science and technology — a segment that UPSC Mains increasingly emphasises. India’s Science, Technology and Innovation Policy (STIP 2020), the National Research Foundation, Anusandhan National Research Foundation Act 2023, and India’s R&D investment challenges are covered with analytical depth. Government flagship missions — National Mission for Quantum Technologies and Applications, National Supercomputing Mission, and the BioE3 Policy — are explained with their objectives, progress, and strategic significance for India’s development goals.

Current affairs coverage focuses on science and technology developments relevant for the UPSC 2025-26 examination cycle. Health technology updates include new vaccine developments, genomics applications, and India’s pharmaceutical sector achievements. Agricultural technology covers precision farming, drone applications in agriculture, and digital agriculture initiatives. Environment science topics include climate modelling, carbon capture technologies, and green hydrogen. India’s international science and technology partnerships — with the USA (iCET initiative), EU, and other nations — are mapped with strategic importance. A dedicated section on intellectual property rights, patents, and technology transfer completes this booklet’s policy-to-practice arc.

Physical Construction and Quality Standards

These Drishti IAS Science and Technology Hindi medium printed booklets are manufactured to withstand the intense daily use of a serious UPSC aspirant — multiple revision cycles, travel between coaching centres, and months of active annotation across a full preparation year.

Paper Quality: 75 GSM Anti-Glare White Paper

Each booklet in this Drishti IAS Science and Technology 2025-26 set is printed on 75 GSM ultra-white paper selected for its high opacity rating. The paper surface accepts all common highlighter colours — yellow, green, pink, and orange — without any bleed-through to the reverse side, allowing double-sided annotation without loss of readability. The anti-glare finish significantly reduces eye strain during the extended study sessions that UPSC preparation demands. Hindi medium aspirants who spend three to five hours daily reading these notes will appreciate the reduced visual fatigue compared to glossy or lower-GSM alternatives commonly found in photocopied notes circulated in Mukherjee Nagar.

Printing Technology: High-Resolution Laser Printing

All four booklets are produced using high-resolution laser printing technology, delivering sharp, consistently black text across every page — critical for reading complex Hindi Devanagari script with diacritical marks (matras) that must be perfectly rendered for accurate reading. Scientific diagrams, flowcharts illustrating technology processes, comparison tables, and maps of ISRO launch sites are reproduced with crisp line definition. Laser toner is heat-fused to the paper surface, making it completely smudge-proof and waterproof once dry — important when students use wet-ink gel pens for underlining. Pages retain full legibility even after multiple colour-coded highlighting passes common in UPSC revision methodology.

Binding and Durability

Booklets are available in spiral binding or book binding depending on stock. Spiral-bound copies open completely flat on any study surface — a significant advantage when writing detailed Mains answers alongside the notes, as no pages curl or resist lying flat. The 300 GSM laminated cover protects against moisture, daily bag-wear, and edge damage during months of heavy use. Book-bound copies are more compact for storage and travel, with a spine that holds firmly through repeated opening and closing. Both binding formats use reinforced inner page attachment, ensuring individual pages do not detach even with aggressive use during intensive UPSC revision phases.

Key Features and Study Design

These Drishti IAS Science and Technology Hindi medium notes are designed around how Hindi medium UPSC aspirants actually study — covering both the analytical Mains answer-writing need and the fact-heavy Prelims MCQ requirement within a single integrated set of printed booklets.

• Naturally Written Hindi — Not Translated: Drishti IAS is widely recognised as the strongest Hindi medium institute for UPSC preparation precisely because their content is originally composed in Hindi. Technical science and technology terms are introduced in both Hindi and English, with intuitive Hindi explanations — not mechanical word-for-word translations that confuse rather than clarify.
• UPSC Syllabus Alignment: Every chapter and section is mapped to the UPSC Civil Services Examination official syllabus for GS Paper III. Topic headings correspond to syllabus keywords, making it straightforward for aspirants to verify coverage and prioritise their study schedule during the crucial months before Prelims and Mains.
• Prelims and Mains Dual Utility: Each topic is structured with factual data points, definition boxes, and numbered lists suited to Prelims MCQ recall, followed by analytical paragraphs with policy dimensions suitable for Mains descriptive answers. Students do not need two separate resources — these booklets serve both examination stages within one set.
• Current Affairs Integration: Unlike static textbooks that become outdated, these 2025-26 edition booklets integrate recent developments in space, defence, biotechnology, and digital policy directly within the subject-matter chapters, reducing the need to separately cross-reference current affairs sources for GS Paper III science topics.
• Structured for Revision: Each chapter ends with a concise summary, key terms glossary in Hindi, and previous year UPSC question references. Margin flags highlight high-frequency UPSC topics. This revision architecture allows aspirants to complete targeted revision of the entire four-booklet set in five to seven days before the actual examination, a critical advantage in the final preparation phase.

Shipping, Packaging and Delivery

Every order of these Drishti IAS Science and Technology Hindi medium printed notes is packaged with care designed to ensure all four booklets arrive in the same brand-new condition they left our Mukherjee Nagar, Delhi store. Each set is individually shrink-wrapped in clear polythene to guard against moisture during transit. The shrink-wrapped bundle is then placed in a corrugated cardboard box with a minimum thickness of 3mm, surrounded by bubble wrap padding. Rigid cardboard edge protectors are inserted along all four sides of the box to prevent corner damage during the rough handling that courier logistics in India can involve. The outer box is sealed with reinforced packing tape and labelled with fragile handling instructions.

Orders are dispatched within one business day of payment confirmation and delivered pan India within 3-5 business days via tracked courier services. A tracking ID is shared via WhatsApp and email immediately upon dispatch, allowing you to monitor your shipment in real time. For any queries, damaged-in-transit concerns, or missing booklet issues, contact us directly on WhatsApp at +91 70045 49563 — missing or damaged booklets are replaced within 48 hours of a confirmed complaint. Delivery is available across all states and union territories, including Tier 2 and Tier 3 cities where Drishti IAS Hindi medium printed notes may not be locally available in bookstores.

Frequently Asked Questions (FAQ)

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