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Access high-quality conceptual notes, formula sheets, and previous year board papers curated by expert educators.
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Maths Interactive Books

Maths & Vedic Maths — with problems, visuals & quizzes

8 Books
✨ NEW
Class 8
Class 8 Mathematics
Complete Formula Book — Chapterwise with Proofs & Diagrams
Formulas
Proofs
Diagrams
📖 16 Sec⏱ Class 8
✨ NEW
Class 6
Patterns in Mathematics
Triangular Numbers, Square Numbers, Cube Numbers, Virahānka & Shape Patterns
Patterns
Triangular Nos.
Square Nos.
📖 10 Sec⏱ Class 6
✨ NEW
Class 6
Lines and Angles
Points, Rays, Parallel & Perpendicular Lines, Angle Types & Measurement
Lines
Angles
Protractor
📖 10 Sec⏱ Class 6
✨ NEW
Class 8
Squares and Cubes
Perfect Squares, Perfect Cubes, Square Roots, Cube Roots & Properties
Squares
Cubes
Roots
📖 11 Sec⏱ Class 8
✨ NEW
Class 12
Relations and Functions
Equivalence Relations, Injective/Surjective/Bijective, Composition & Invertible Functions
Relations
Functions
Bijective
📖 11 Sec⏱ Class 12
✨ NEW
Class 11
Sets
Set Theory, Subsets, Union, Intersection, Complement & De Morgan’s Laws
Sets
Venn Diagrams
Subsets
📖 11 Sec⏱ Class 11
✨ NEW
All Classes
Vedic Maths — Fundamentals
Multiply by 11, Squaring, Nikhilam Sutra, Fast Add/Sub, Division & Multiplication Secrets
Vedic Maths
Mental Math
Speed
📖 8 Sec⏱ Class 6-12
✨ NEW
All Classes
Vedic Maths — Advanced
Percentages, Squares/Cubes, Algebra, Competitive Exams, Practice & Championship
JEE
SSC
Olympiad
📖 8 Sec⏱ Class 8-12
CSE Interactive Books

Computer Science, Programming, AI & More

211 Books
✨ NEW
Full Stack Engineering with Next.js, NestJS & DevOps
Prepared by eduartha — A comprehensive enterprise engineering track covering modern Javascript, Next.js, backend architecture with NestJS, and DevOps.
Next.js
NestJS
Full Stack
📖 13 Sec⏱ 45 mins
✨ NEW
Software Developer Interview Handbook 2026
Prepared by eduartha — Complete Interview Preparation Guide for TCS Prime, Digital, Ninja, Infosys, Wipro, Accenture, Capgemini, Cognizant, Deloitte, HCL, IBM & Product Companies. 25 Chapters · 120+ Topics · 350+ Questions. ₹5,000 → ₹3,000 (₹2,000 OFF)
Interview Prep
TCS
Placement
📖 25 Sec⏱ Self-paced
✨ NEW
Understanding AI: From Zero to nanoCodeGPT
An interactive journey building a multi-language coding AI from scratch using Karpathy's nanoGPT architecture.
AI
nanoGPT
LLMs
📖 16 Sec⏱ 4-6 hours
✨ NEW
Secrets of AI Models
Build models from scratch, fine-tune on custom data & master transfer learning across Image, Video, Audio, Reasoning, Coding, Language, Cyber Security & Biological models.
AI
Models
Architecture
📖 10 Sec⏱ Self-paced
✨ NEW
AI Fundamentals (Hindi Edition)
AI डाटा से कैसे सीखता है? पैटर्न कैसे पहचानता है? प्रेडिक्शन और इंसानों की भाषा समझना।
AI
Hindi
Beginners
📖 4 Sec⏱ Self-paced
✨ NEW
Machine Learning
Comprehensive guide to Machine Learning
Machine Learning
📖 15 Sec⏱ Self-paced
✨ NEW
Mathematics for AI
Foundational mathematics for artificial intelligence
Maths
AI
📖 12 Sec⏱ Self-paced
✨ NEW
Programming & Software Engineering
Core programming and software engineering principles
Programming
Software Engineering
📖 20 Sec⏱ Self-paced
✨ NEW
Classical Machine Learning
In-depth look at classical ML algorithms
Classical ML
📖 18 Sec⏱ Self-paced
✨ NEW
Deep Learning
Advanced deep learning architectures and methods
Deep Learning
📖 25 Sec⏱ Self-paced
✨ NEW
Large Language Models (LLMs)
Understanding and building LLMs
LLMs
📖 10 Sec⏱ Self-paced
✨ NEW
Systems, Infrastructure & Research
ML systems, infrastructure, and latest research
Systems
Infrastructure
📖 14 Sec⏱ Self-paced
✨ NEW
Industry Problems & Solutions
Real-world AI/ML case studies and solutions
Industry
Case Studies
📖 16 Sec⏱ Self-paced
✨ NEW
Build Your Own AI — From Zero to ChatBot
Bigrams, Neural Networks, Transformers, Mini-GPT & Fine-Tuning
From Zero
Transformer
GPT
📖 7 Sec⏱ 5–6 Hours
✨ NEW
Python Programming
Complete University Course — Variables to Web Scraping
Python
OOP
Files
📖 14 Sec⏱ 6 Units
✨ NEW
PyTorch: Fundamentals
Tensors, Autograd, Models, Training & Deployment
PyTorch
Tensors
Autograd
📖 14 Sec⏱ 3–5 Months
Programming & Software Engineering
DSA, System Design & Production Engineering
DSA
System Design
Git
📖 14 Sec⏱ 3–6 Months
Mathematics for AI
Linear Algebra, Calculus, Probability & Optimization
Linear Algebra
Calculus
Probability
📖 14 Sec⏱ 2–4 Months
Classical Machine Learning
Regression, Trees, SVMs, Clustering & Ensembles
Regression
SVM
Random Forest
📖 14 Sec⏱ 2–4 Months
Deep Learning
CNNs, RNNs, GANs, Transformers & Architectures
CNN
RNN
GAN
📖 14 Sec⏱ 3–6 Months
Large Language Models
Transformers, Pre-training, Alignment & Deployment
GPT
RLHF
LoRA
📖 14 Sec⏱ 6–12 Months
Machine Learning Systems
Full-Stack ML — From Notebooks to Deployment
MLOps
Docker
CI/CD
📖 14 Sec⏱ 2–4 Months
Industry Problems & Solutions
Medical AI, Fraud Detection, LLM Deployment & More
Medical AI
Fraud
Privacy
📖 14 Sec⏱ Reference
✨ NEW
Building AI Agents — From Scratch
ReAct, Tool Use, Memory, Planning & Multi-Agent Systems
Agents
ReAct
Tool Use
📖 14 Sec⏱ 3–5 Months
✨ NEW
DL Specialization: Neural Networks & CV
Perceptrons, Backprop, CNNs, Detection & Segmentation
Neural Nets
CNNs
Detection
📖 14 Sec⏱ 3–5 Months
✨ NEW
DL Specialization: Sequence Models & GenAI
RNNs, Transformers, GANs, Diffusion & LLM Fine-Tuning
Transformers
GANs
Diffusion
📖 14 Sec⏱ 3–5 Months
✨ NEW
Computer Programming in C
From Basics to Pointers, Structures, Dynamic Memory & Industry Problems
C Language
Pointers
Arrays
📖 10 Sec⏱ 3–4 Months
✨ NEW
DSA: Arrays — Industry Edition
Complexity Analysis, Searching, Sorting — IRCTC, Flipkart & Google Examples
DSA
Arrays
Sorting
📖 8 Sec⏱ Unit 1
✨ NEW
DSA: Linked Lists — Industry Edition
Singly, Doubly & Header Linked Lists — Spotify, Google Docs & Linux Examples
DSA
Linked Lists
SLL
📖 8 Sec⏱ Unit 2
✨ NEW
DSA: Stacks, Queues & Recursion
Polish Notation, Tower of Hanoi, Merge Sort & Quick Sort — Swiggy, Paytm & Amazon
DSA
Stacks
Queues
📖 8 Sec⏱ Unit 3
✨ NEW
DSA: Trees — Industry Edition
Binary Trees, BST, Traversals, LCA — Nykaa, MongoDB & Linux VFS
DSA
Trees
BST
📖 8 Sec⏱ Unit 4
✨ NEW
DSA: Heaps, Hashing & Graphs
HeapSort, Hash Tables, BFS, DFS, Dijkstra — Ola, PhonePe & Google Maps
DSA
Heaps
Hashing
📖 8 Sec⏱ Unit 5
✨ NEW
IPL: Fundamentals of HTML5
Semantic Elements, Metadata & SEO, Validation — Zomato, Flipkart & Razorpay
HTML5
Semantic
SEO
📖 8 Sec⏱ Unit 1
✨ NEW
IPL: Advanced HTML5 & Responsive Design
Forms, Tables, Media, srcset, Lazy Loading — IRCTC, Swiggy & OYO
HTML5
Forms
Tables
📖 8 Sec⏱ Unit 2
✨ NEW
IPL: CSS3 & Modern Layouts
Selectors, Flexbox, Grid, Variables, Responsive Design — CRED, Swiggy & Zerodha
CSS3
Flexbox
Grid
📖 8 Sec⏱ Unit 3
✨ NEW
IPL: JavaScript Core & ES6+
Variables, Async/Await, Fetch API, JSON, localStorage — PhonePe, Swiggy & Razorpay
JavaScript
ES6
Async
📖 8 Sec⏱ Unit 4
✨ NEW
IPL: JS Functions, Events & Validation
Higher-Order Functions, addEventListener, Form Validation — Swiggy, Flipkart & Razorpay
JavaScript
Events
Validation
📖 8 Sec⏱ Unit 5
✨ NEW
IPL: JavaScript DOM & BOM
DOM Manipulation, classList, IntersectionObserver, BOM — Flipkart, Swiggy & Zerodha
DOM
BOM
Events
📖 8 Sec⏱ Unit 6
✨ NEW
OTC: Computer System
CPU, RAM, SSD, GPU, RAID — Hardware Fundamentals for ISRO, Flipkart & TCS
Hardware
CPU
RAM
📖 8 Sec⏱ Unit 1
✨ NEW
OTC: Operating System & Languages
OS Architecture, Boot Process, Kernel, Compiler Phases, JIT — ISRO, Infosys & Google
OS
Kernel
Compiler
📖 8 Sec⏱ Unit 2
✨ NEW
OTC: Linux OS & File Systems
Shell Commands, Permissions, ext4, VMs — AWS, TCS & IIT Server Rooms
Linux
Shell
FileSystem
📖 8 Sec⏱ Unit 3
✨ NEW
OTC: Networks & Security
TCP/IP, OSI, Firewalls, Ransomware — AIIMS, CERT-In & Jio 5G
Networking
Security
TCP/IP
📖 8 Sec⏱ Unit 4
✨ NEW
OTC: Git, AI & Profiles
Git Workflow, Generative AI, Prompt Engineering & Developer Identity
Git
AI
GitHub
📖 8 Sec⏱ Unit 5
✨ NEW
DBMS: Introduction
File Systems vs DBMS, ER Model, Relational Model & Keys
DBMS
ER Model
SQL
📖 8 Sec⏱ Unit 1
✨ NEW
DBMS: DDL, DML & SQL
CREATE, ALTER, INSERT, SELECT, Functions, Window Functions & DCL
SQL
DDL
DML
📖 8 Sec⏱ Unit 2
✨ NEW
DBMS: Relational Operations
JOINs, Aggregates, Subqueries, Views, CTEs & Relational Algebra
JOINs
Subqueries
Views
📖 8 Sec⏱ Unit 3
✨ NEW
DBMS: Normalization
FDs, 1NF → BCNF, Closure, Decomposition & Denormalization
Normalization
3NF
BCNF
📖 8 Sec⏱ Unit 4
✨ NEW
DBMS: PL/SQL Programming
Blocks, Cursors, Procedures, Functions, Triggers & Packages
PL/SQL
Cursors
Triggers
📖 8 Sec⏱ Unit 5
✨ NEW
DBMS: Transaction Processing
ACID, Concurrency Control, Locking, Deadlocks & Recovery
ACID
Locking
2PL
📖 8 Sec⏱ Unit 6
✨ NEW
Excel Mastery: Fundamentals
Introduction, Data Entry, Formatting & Basic Calculations
Excel
Formatting
Formulas
📖 3 Sec⏱ Part I
✨ NEW
Excel Mastery: Essential Functions
Mathematical, Logical, Text & Date/Time Functions
SUM
IF
VLOOKUP
📖 4 Sec⏱ Part II
✨ NEW
Excel Mastery: Data Management
Sorting, Filtering, Validation, Tables & Named Ranges
Sort
Filter
Tables
📖 5 Sec⏱ Part III
✨ NEW
Excel Mastery: Lookup & Reference
VLOOKUP, HLOOKUP, XLOOKUP, INDEX-MATCH & Dynamic Arrays
VLOOKUP
XLOOKUP
INDEX
📖 5 Sec⏱ Part IV
✨ NEW
Excel Mastery: Data Visualization
Charts, Sparklines & Conditional Formatting Dashboards
Charts
Sparklines
Dashboards
📖 3 Sec⏱ Part V
✨ NEW
Excel Mastery: Pivot Tables & Reporting
Pivot Tables, Charts, Slicers, Timelines & Power Query
Pivot Tables
Slicers
Power Query
📖 6 Sec⏱ Part VI
✨ NEW
Excel Mastery: Advanced Excel
What-If Analysis, Goal Seek, Scenario Manager & Solver
What-If
Solver
Goal Seek
📖 5 Sec⏱ Part VII
✨ NEW
Excel Mastery: Data Analysis
Statistics, Correlation, Regression, Forecasting & ToolPak
Statistics
Regression
Forecasting
📖 5 Sec⏱ Part VIII
✨ NEW
Excel Mastery: Automation
Macros, VBA Fundamentals, Loops, UserForms & Error Handling
Macros
VBA
UserForms
📖 7 Sec⏱ Part IX
✨ NEW
Excel Mastery: Professional Dashboards
KPI, Sales, HR, School & Research Dashboards
KPI
Sales
HR
📖 5 Sec⏱ Part X
✨ NEW
Excel Mastery: Capstone Projects
10 Complete Projects — School, Payroll, GST, Sales & BI
Projects
Payroll
GST
📖 10 Sec⏱ Part XI
✨ NEW
OTC-II: Data Science & Big Data
Data Lifecycle, Hadoop, Tableau, R, Excel & Cloud Analytics — Aadhaar, UPI & Flipkart
Data Science
Hadoop
Tableau
📖 11 Sec⏱ Unit 1
✨ NEW
OTC-II: AI & Machine Learning
ML, Deep Learning, NLP, ChatGPT, Expert Systems & AR — Niramai, CoWIN & Razorpay
AI
ML
NLP
📖 11 Sec⏱ Unit 2
✨ NEW
OTC-II: Cyber Security
CIA Triad, Malware, Nmap, Wireshark, Secure Browsing — AIIMS, CERT-In & UPI Security
Security
Nmap
Wireshark
📖 11 Sec⏱ Unit 3
✨ NEW
OTC-II: DevOps & Software Engineering
Git, Docker, Selenium, Kubernetes, CI/CD & Testing — Flipkart, Zoho & IRCTC
DevOps
Git
Docker
📖 11 Sec⏱ Unit 4
✨ NEW
OTC-II: Cloud Computing
IaaS, PaaS, SaaS, AWS, Virtualization & Serverless — MeghRaj, Jio Cloud & TCS
Cloud
AWS
IaaS
📖 11 Sec⏱ Unit 5
✨ NEW
OTC-II: Full Stack Web Dev & UI/UX
HTML, CSS, JS, PHP, REST APIs, Responsive Design — Zerodha, CRED & IRCTC
HTML
CSS
JS
📖 11 Sec⏱ Unit 6
✨ NEW
OTC-II: Capstone & Career Launchpad
Portfolio, LinkedIn, Freelancing, Cold Emails & Earn-Ready Checklist
Portfolio
Freelance
Career
📖 11 Sec⏱ Unit 7
✨ NEW
OS: Introduction to Operating Systems
OS Types, Structure, System Calls, Kernel vs User Mode — IRCTC, Aadhaar & ISRO
OS
Linux
System Calls
📖 11 Sec⏱ Unit 1
✨ NEW
OS: Process Management
PCB, Process States, fork/exec/wait, Context Switching — Aadhaar & CoWIN
Process
PCB
fork
📖 11 Sec⏱ Unit 2
✨ NEW
OS: CPU Scheduling
FCFS, SJF, SRTF, Priority, Round Robin, MLQ — Gantt Charts & Numericals
Scheduling
FCFS
RR
📖 11 Sec⏱ Unit 3
✨ NEW
OS: Process Synchronization & Threads
Semaphores, Monitors, Dining Philosophers, Pthreads — SBI & Indian Railways
Semaphore
Mutex
Threads
📖 11 Sec⏱ Unit 4
✨ NEW
OS: Deadlock
Banker's Algorithm, RAG, Prevention, Detection — Mumbai Traffic & RBI Analogy
Deadlock
Banker
RAG
📖 11 Sec⏱ Unit 5
✨ NEW
OS: Protection & Security
Access Matrix, Buffer Overflow, Authentication, Malware — AIIMS & Aadhaar
Security
Access Matrix
Auth
📖 11 Sec⏱ Unit 6
✨ NEW
OS: Memory Management
Paging, Segmentation, TLB, Page Replacement (FIFO/LRU/OPT) — Numericals
Paging
TLB
LRU
📖 11 Sec⏱ Unit 7
✨ NEW
OS: File & Device Management
File Allocation, Disk Scheduling (SCAN/C-SCAN/LOOK), Free Space — Numericals
File System
Disk
SCAN
📖 11 Sec⏱ Unit 8
✨ NEW
OS: Inter Process Communication
Pipes, Shared Memory, Message Queues, POSIX IPC — Indian Railways & Microservices
IPC
Pipes
Shared Memory
📖 11 Sec⏱ Unit 9
✨ NEW
OS: Capstone & Career Launchpad
Portfolio Projects, Top 50 Interview Q&A, Freelance Templates + 7 Appendices
Portfolio
Interview
Career
📖 11 Sec⏱ Unit 10
✨ NEW
Java: Introduction to Java
History, JDK/JRE/JVM, Bytecode, Hello World — Ola, BHIM & IRCTC Under the Hood
Java
JVM
JDK
📖 13 Sec⏱ Unit 1
✨ NEW
Java: Data Types, Variables & Wrappers
Primitives, Casting, Access Modifiers, Autoboxing — Paytm Wallet & UPI
Data Types
Wrapper
Casting
📖 13 Sec⏱ Unit 2
✨ NEW
Java: Operators
Arithmetic, Bitwise, Ternary, Precedence — Zerodha P&L Calculator
Operators
Bitwise
Ternary
📖 13 Sec⏱ Unit 3
✨ NEW
Java: Conditional Statements
if/else, switch-case, Enhanced Switch (Java 14+) — IRCTC Fare Calculator
if-else
switch
Conditions
📖 13 Sec⏱ Unit 4
✨ NEW
Java: Loops, Arrays & Enums
for/while, 1D/2D Arrays, Varargs, EnumSet — Nifty Price Analyzer
Loops
Arrays
Enums
📖 13 Sec⏱ Unit 5
✨ NEW
Java: OOP — Classes, Objects & Constructors
Class Design, this Keyword, Overloading, Static — Zomato Order System
OOP
Class
Constructor
📖 13 Sec⏱ Unit 6
✨ NEW
Java: String & StringBuilder
String Pool, Immutability, All Methods, Mutability — UPI ID Validator
String
StringBuilder
Pool
📖 13 Sec⏱ Unit 7
✨ NEW
Java: Inheritance & Polymorphism
extends, super, Overriding, Dynamic Dispatch — Paytm Payment Hierarchy
Inheritance
Polymorphism
Override
📖 13 Sec⏱ Unit 8
✨ NEW
Java: Abstract Class & Interface
Abstract Methods, Default/Static, Functional Interface — Aadhaar API Contract
Abstract
Interface
Functional
📖 13 Sec⏱ Unit 9
✨ NEW
Java: Nested Classes & Lambda Expressions
Inner Classes, Lambdas, Method Refs, java.util.function — Swiggy Fee Calculator
Lambda
Nested
Method Ref
📖 13 Sec⏱ Unit 10
✨ NEW
Java: Exceptions & Multithreading
try/catch, Custom Exceptions, Threads, Synchronization — Zerodha Order Book
Exception
Thread
Sync
📖 13 Sec⏱ Unit 11
✨ NEW
Java: I/O Fundamentals & Generics
FileReader, Serialization, Generic Classes, Wildcards — Aadhaar Data Export
I/O
File
Generics
📖 13 Sec⏱ Unit 12
✨ NEW
Java: Collections Framework
ArrayList, HashMap, TreeSet, PriorityQueue — Flipkart BBD Product Catalog
Collections
HashMap
ArrayList
📖 13 Sec⏱ Unit 13
✨ NEW
Java: JDBC Database Programming
JDBC Architecture, CRUD, PreparedStatement, Connection Pool — IRCTC Booking DB
JDBC
SQL
CRUD
📖 13 Sec⏱ Unit 14
✨ NEW
Java: Capstone & Career Launchpad
Portfolio, Top 50 Interview Q&A, Freelance Templates + Appendices
Portfolio
Interview
Career
📖 13 Sec⏱ Unit 15
✨ NEW
COA: Basics of Digital Systems
5-Unit Model, Combinational & Sequential Circuits, Flip-Flops — ISRO PSLV Flight Computer
COA
Digital
Circuits
📖 12 Sec⏱ Unit 1
✨ NEW
COA: Register Transfer & Micro Ops
RTL, Bus System, Shift Registers, ALSU — Intel Core i9 Register Architecture
RTL
Register
Shift
📖 12 Sec⏱ Unit 2
✨ NEW
COA: Computer Organization
Instruction Cycle, Mano Machine, Timing & Control — Snapdragon Decode Unit
Instruction
Fetch
Decode
📖 12 Sec⏱ Unit 3
✨ NEW
COA: Central Processing Unit
Stack, Addressing Modes, RISC vs CISC, PSW — ARM vs Intel Battle
CPU
RISC
CISC
📖 12 Sec⏱ Unit 4
✨ NEW
COA: Input-Output Organization
DMA, Interrupts, UART, I/O Modes — Aadhaar Biometric Scanner DMA
DMA
Interrupt
UART
📖 12 Sec⏱ Unit 5
✨ NEW
COA: Memory Unit
Cache Mapping, Virtual Memory, Hierarchy — Snapdragon Cache Architecture
Cache
Memory
Virtual
📖 12 Sec⏱ Unit 6
✨ NEW
COA: Computer Arithmetic
Booth's Algorithm, Division, IEEE 754 — ARM Cortex Hardware Multiplier
Booth
Multiply
Division
📖 12 Sec⏱ Unit 7
✨ NEW
COA: Parallel Processing
Pipelining, Hazards, SIMD/MIMD, Superscalar — AWS Parallel at Scale
Pipeline
Hazard
SIMD
📖 12 Sec⏱ Unit 8
✨ NEW
COA: Capstone & Career Launchpad
CPU Simulator Portfolio, GATE Prep, VLSI Careers + Appendices
Portfolio
GATE
VLSI
📖 12 Sec⏱ Unit 9
✨ NEW
CC: Behaviour Analysis
Time & Space Complexity, Big-O, Trade-offs — Why Zomato's Search is O(1) Not O(n)
Big-O
Complexity
Analysis
📖 13 Sec⏱ Unit 1
✨ NEW
CC: Primality Testing
Sieve of Eratosthenes, Fermat, Segmented Sieve, Atkins — UPI Encryption Backbone
Primes
Sieve
Fermat
📖 13 Sec⏱ Unit 2
✨ NEW
CC: Recursion & Advanced Techniques
Backtracking, Memoization, Tail Recursion — Solving N-Queens & Sudoku
Recursion
Backtracking
Memoization
📖 13 Sec⏱ Unit 3
✨ NEW
CC: Basic Dynamic Programming
Tiling, Tabulation vs Memoization, Optimal Substructure — Paytm Cashback Optimizer
DP
Tabulation
Memoization
📖 13 Sec⏱ Unit 4
✨ NEW
CC: DP Problems
LIS, LCS, Knapsack, Edit Distance, Box Stacking — Flipkart Warehouse Optimizer
LIS
LCS
Knapsack
📖 13 Sec⏱ Unit 5
✨ NEW
CC: Efficient Sorting Algorithms
Merge Sort, Quick Sort, Counting Sort, String Sorting — Naukri.com Resume Ranker
Merge Sort
Quick Sort
Counting
📖 13 Sec⏱ Unit 6
✨ NEW
CC: Capstone & Contest Launchpad
Portfolio, Contest Strategy, Interview Patterns + Appendices
Portfolio
Codeforces
Interview
📖 13 Sec⏱ Unit 7
✨ NEW
AS-II: Time & Work + Pipes
Work Done Together, Efficiency, Men-Women-Children, Wages, Inlet-Outlet — TCS/Infosys Aptitude
Time & Work
Pipes
Efficiency
📖 13 Sec⏱ Unit 1
✨ NEW
AS-II: Syllogism & Guesstimation
Venn Diagrams, Possibility, Number Ranking, Market Sizing — Consulting & Bank Exams
Syllogism
Venn
Ranking
📖 13 Sec⏱ Unit 2
✨ NEW
AS-II: Mensuration, Calendar & Clocks
Surface Area, Volume, Date-Day Finding, Clock Angles — SSC/Bank/Placement Must-Know
Mensuration
Calendar
Clocks
📖 13 Sec⏱ Unit 3
✨ NEW
AS-II: Speed, Trains & Boats
Time-Speed-Distance, Relative Speed, Upstream/Downstream — Railway & Logistics Problems
Speed
Trains
Boats
📖 13 Sec⏱ Unit 4
✨ NEW
AS-II: Height, Reasoning & Puzzles
Trigonometric Heights, Seating Arrangements, Floor Puzzles — Interview Crackers
Height
Seating
Puzzles
📖 13 Sec⏱ Unit 5
✨ NEW
AS-II: Data Interpretation & Sufficiency
Bar/Pie/Line Graphs, Tabulation, Data Sufficiency — CAT/GMAT/Placement Essential
DI
Bar Graph
Pie Chart
📖 13 Sec⏱ Unit 6
✨ NEW
AS-II: Capstone & Exam Launchpad
Full Mock Tests, Exam Strategy, Speed Tricks + Formula Appendices
Mock Test
Exam
Strategy
📖 13 Sec⏱ Unit 7
✨ NEW
AAS-II: Advanced Efficiency & Pipes
Chain Rule, Wages, Alternate Work, Advanced Inlet-Outlet — Placement Cracker
Efficiency
Pipes
Chain Rule
📖 13 Sec⏱ Unit 1
✨ NEW
AAS-II: Syllogism & Guesstimation
Venn Diagrams, Possibility, Market Sizing, Time Sequence & Ranking
Syllogism
Guesstimation
Ranking
📖 13 Sec⏱ Unit 2
✨ NEW
AAS-II: Surface Area & Volume
2D Perimeter, Cube, Cuboid, Sphere, Hemisphere, Cone, Cylinder — Advanced Problems
Mensuration
Surface Area
Volume
📖 13 Sec⏱ Unit 3
✨ NEW
AAS-II: Advanced Calendar & Clocks
Century Code, Gain/Loss of Time, Angle Problems — Bank Exam Must-Know
Calendar
Clocks
Odd Days
📖 13 Sec⏱ Unit 4
✨ NEW
AAS-II: Advanced TSD & Races
Average Speed, Ratio Problems, Races, Relative Speed, Upstream/Downstream
Speed
Distance
Races
📖 13 Sec⏱ Unit 5
✨ NEW
AAS-II: Trigonometry & Seating
Height-Distance, Linear/Circular Seating, Floor & Interview Puzzles
Trigonometry
Seating
Puzzles
📖 13 Sec⏱ Unit 6
✨ NEW
AAS-II: Coded Inequalities
Coded Symbols, Quadratic Roots Comparison, Chain Inequalities
Inequalities
Coded
Quadratic
📖 13 Sec⏱ Unit 7
✨ NEW
AAS-II: Advanced DI & Sufficiency
Bar/Pie/Line/Histogram, Mixed Graphs, Data Sufficiency — CAT/GMAT Level
DI
Bar Graph
Pie Chart
📖 13 Sec⏱ Unit 8
✨ NEW
Programming IoT with Arduino
LCD, Sensors, Motors, RFID, Bluetooth, WiFi, ThingSpeak Cloud — Complete Hands-On Guide
Arduino
IoT
Sensors
📖 36 Sec⏱ Full Course
✨ NEW
Intro IoT: Embedded Systems & Architectures
CISC/RISC, Von-Neumann/Harvard, 8051/AVR/PIC/ARM, Arduino/NodeMCU/RPi, IoT Levels
IoT
Embedded
8051
📖 13 Sec⏱ Unit 1
✨ NEW
Intro IoT: Arduino Setup & Hardware
IDE Installation, Blink Sketch, UNO Architecture, ATMega328, Pin Mapping
Arduino
IDE
ATMega328
📖 13 Sec⏱ Unit 2
✨ NEW
Intro IoT: Serial Communication & Bluetooth
UART, SPI, I2C Protocols, Baud Rate, HC-05 AT Commands
Serial
SPI
I2C
📖 13 Sec⏱ Unit 3
✨ NEW
Intro IoT: Visual Output & Sensors
LED, 7-Segment, LCD, Ultrasonic HC-SR04, DHT22, PIR, IR Sensor
LED
LCD
Ultrasonic
📖 13 Sec⏱ Unit 4
✨ NEW
Intro IoT: Actuators & Motors
DC Motor, L293D Driver, Servo Motor, Potentiometer Control
DC Motor
Servo
L293D
📖 13 Sec⏱ Unit 5
✨ NEW
Intro IoT: Communication Protocols
Bluetooth, Cellular, RFID, LoRa, CAN, WiFi, NFC — Complete Guide
Bluetooth
WiFi
RFID
📖 13 Sec⏱ Unit 6
✨ NEW
Intro IoT: Futuristic Technologies
AI, VR, Smart Cities, Brain-Computer Interfaces, Autonomous Vehicles, Renewable Energy
AI
VR
Smart Cities
📖 13 Sec⏱ Unit 7
NNDL V1 Ch1: Why Deep Learning?
AI Revolution, Jio Case Study, GPU Analogy, Timeline 1943–2024
AI
DL
Foundations
📖 13 Sec⏱ Ch 1
NNDL V1 Ch2: Mathematical Toolkit
Linear Algebra, Calculus, Probability, Information Theory + NumPy
Math
Linear Algebra
V1
📖 13 Sec⏱ Ch 2
NNDL V1 Ch3: Python & NumPy
Vectorization, Broadcasting, Colab, IPL Data EDA
Python
NumPy
V1
📖 13 Sec⏱ Ch 3
NNDL V1 Ch4: The Neuron
McCulloch-Pitts, Perceptron, XOR Crisis, Aadhaar
Perceptron
Neuron
V1
📖 13 Sec⏱ Ch 4
NNDL V1 Ch5: Logistic Regression
Sigmoid, BCE, GD, CIBIL/SBI Case Study
Logistic Regression
V1
📖 13 Sec⏱ Ch 5
NNDL V1 Ch6: Shallow NNs
Hidden Layer, Activations, Backprop, MuSigma
MLP
V1
📖 13 Sec⏱ Ch 6
NNDL V1 Ch7: Deep NNs
L-Layer, Dimensions, TCS Ignio
Deep Networks
V1
📖 13 Sec⏱ Ch 7
NNDL V1 Ch8: Optimization
SGD, Momentum, Adam, Flipkart
Adam
SGD
V1
📖 13 Sec⏱ Ch 8
NNDL V1 Ch9: Regularization
L1/L2, Dropout, BYJU'S
Dropout
L2
V1
📖 13 Sec⏱ Ch 9
NNDL V1 Ch10: Batch Norm & Tricks
BN, LayerNorm, Xavier/He, InMobi
Batch Norm
V1
📖 13 Sec⏱ Ch 10
NNDL V1 Ch11: Hyperparameters
Random Search, LR Finder, Ola
Tuning
V1
📖 13 Sec⏱ Ch 11
NNDL V1 Ch12: CNNs
Convolution, ResNet, DigiYatra
CNN
V1
📖 13 Sec⏱ Ch 12
NNDL V1 Ch13: RNNs
BPTT, Language Models, Zepto
RNN
V1
📖 13 Sec⏱ Ch 13
NNDL V1 Ch14: LSTMs & GRUs
Gates, BiLSTM, HDFC Fraud
LSTM
V1
📖 13 Sec⏱ Ch 14
NNDL V1 Ch15: Transformers
Attention, BERT/GPT, AI4Bharat
Transformer
V1
📖 13 Sec⏱ Ch 15
NNDL V1 Ch16: GANs & VAEs
Generative, Deepfakes, Meesho
GAN
VAE
V1
📖 13 Sec⏱ Ch 16
NNDL V1 Ch17: Applied CV
5 CV Projects: Plant, Currency, Traffic
CV
Projects
V1
📖 13 Sec⏱ Ch 17
NNDL V1 Ch18: Applied NLP
5 NLP Projects: Hindi, Legal, IRCTC
NLP
Projects
V1
📖 13 Sec⏱ Ch 18
NNDL V1 Ch19: RecSys
Neural CF, YouTube DNN, Amazon India
RecSys
V1
📖 13 Sec⏱ Ch 19
NNDL V1 Ch20: Time Series
LSTM, TCN, Nifty 50, Jio Network
Time Series
V1
📖 13 Sec⏱ Ch 20
NNDL V1 Ch21: MLOps
FastAPI, Docker, TFServing, Infosys
MLOps
V1
📖 13 Sec⏱ Ch 21
NNDL V1 Ch22: Future & Ethics
LLMs, Diffusion, DPDPA, Careers + Appendices
Ethics
Careers
V1
📖 13 Sec⏱ Ch 22
✨ NEW
NNDL Ch0: Math You Need
Linear Algebra, Calculus, Probability — Dual India+US Context, GATE Prep
Math
Linear Algebra
Calculus
📖 20 Sec⏱ Ch 0
✨ NEW
NNDL Ch1: Why Deep Learning Now?
Dual India+US Examples, Career Map, GATE Corner, Meesho Fraud Story
AI
DL
Foundations
📖 20 Sec⏱ Ch 1
✨ NEW
NNDL Ch2: The Perceptron
Bio→Math Neuron, XOR Crisis, HDFC Loan + Gmail Spam, GATE Corner
Perceptron
Neuron
XOR
📖 20 Sec⏱ Ch 2
✨ NEW
NNDL Ch3: Logistic Regression as NN
Sigmoid, BCE from MLE, CIBIL/SBI + Google Ads, GATE Corner
Logistic Regression
Sigmoid
MLE
📖 20 Sec⏱ Ch 3
✨ NEW
NNDL Ch4: Loss Functions
MSE, BCE, Hinge, Focal Loss — Swiggy + Uber, Cost Landscape
Loss
MSE
Cross-Entropy
📖 20 Sec⏱ Ch 4
✨ NEW
NNDL Ch5: Gradient Descent
Himalayan Analogy, SGD/Adam from Scratch, Flipkart + OpenAI GPT
SGD
Adam
Momentum
📖 20 Sec⏱ Ch 5
✨ NEW
NNDL Ch6: Backpropagation
Chain Rule in Action, Computation Graphs, Paytm + Tesla
Backprop
Chain Rule
Computation Graph
📖 20 Sec⏱ Ch 6
✨ NEW
NNDL Ch7: One Hidden Layer NNs
Universal Approximation, Zomato + Netflix, From Scratch
MLP
Hidden Layer
Universal Approximation
📖 20 Sec⏱ Ch 7
✨ NEW
NNDL Ch8: Activation Functions
ReLU, Sigmoid, Tanh, GELU — Why Non-Linearity, Dying ReLU
ReLU
Sigmoid
Tanh
📖 20 Sec⏱ Ch 8
✨ NEW
NNDL Ch9: Vectorized Implementation
NumPy Mastery, Broadcasting, 500x Speedup, Colab GPU
NumPy
Vectorization
Broadcasting
📖 20 Sec⏱ Ch 9
✨ NEW
NNDL Ch10: Deep NN Architecture
L-Layer Design, Dimension Guide, TCS Ignio + Google Brain
Deep Networks
Architecture
Layers
📖 20 Sec⏱ Ch 10
✨ NEW
NNDL Ch11: Why Depth?
Representation Power, Circuit Theory, Feature Hierarchy
Depth
Representation
Feature Learning
📖 20 Sec⏱ Ch 11
✨ NEW
NNDL Ch12: Practical Deep Learning
Init, Regularization, BatchNorm, Dropout — InMobi + Meta
BatchNorm
Dropout
L2
📖 20 Sec⏱ Ch 12
✨ NEW
NNDL Ch13: CNNs
AlexNet→ResNet, Aadhaar Face Auth + Tesla Autopilot, GATE
CNN
Convolution
ResNet
📖 20 Sec⏱ Ch 13
✨ NEW
NNDL Ch14: RNNs & LSTMs
BPTT, Gates, IRCTC Demand + Google Translate, GATE Corner
RNN
LSTM
GRU
📖 20 Sec⏱ Ch 14
✨ NEW
NNDL Ch15: Transformers & Attention
Self-Attention, BERT/GPT, AI4Bharat + OpenAI, GATE Corner
Transformer
Attention
BERT
📖 20 Sec⏱ Ch 15
✨ NEW
NNDL Ch16: Autoencoders
Representation Learning, VAE, Denoising, Anomaly Detection
Autoencoder
VAE
Representation
📖 20 Sec⏱ Ch 16
✨ NEW
NNDL Ch17: Transfer Learning
Fine-Tuning, Domain Adaptation, Flipkart + HuggingFace
Transfer Learning
Fine-Tuning
Pretrained
📖 20 Sec⏱ Ch 17
✨ NEW
NNDL Ch18: Generative Models
GANs, VAEs, Diffusion — Meesho + Midjourney, Ethics
GAN
Diffusion
Generative
📖 20 Sec⏱ Ch 18
✨ NEW
NNDL Ch19: RL Foundations
MDP, Q-Learning, Policy Gradient — ISRO + AlphaGo/DeepMind
RL
Q-Learning
Policy Gradient
📖 20 Sec⏱ Ch 19
✨ NEW
NNDL Ch20: Applied CV Projects
5 Indian CV Projects: Crop Disease, Currency Auth, Traffic Signs, X-Ray, YOLO
CV
Projects
YOLO
📖 20 Sec⏱ Ch 20
✨ NEW
NNDL Ch21: Applied NLP Projects
5 Indian NLP Projects: Hindi Sentiment, Legal, IRCTC Chatbot, Fake News, NMT
NLP
Hindi
BERT
📖 20 Sec⏱ Ch 21
✨ NEW
NNDL Ch22: MLOps, Ethics & Future
MLOps Pipeline, Docker, Edge AI, DPDPA, LLMs, Career + 6 Appendices
MLOps
Ethics
Career
📖 20 Sec⏱ Ch 22
✨ NEW
MLAI Ch1: Introduction to AI & ML
AI Revolution, ML Basics, Types of Learning — Aadhaar + Google + Tesla
AI
ML
Foundations
📖 24 Sec⏱ Ch 1
✨ NEW
MLAI Ch2: History & AI Revolution
Turing to GPT-4, AI in India & World, Future of AI
History
AI Revolution
Future
📖 24 Sec⏱ Ch 2
✨ NEW
MLAI Ch3: Python & Data Science Ecosystem
Python, NumPy, Pandas, Matplotlib, Sklearn, TensorFlow Setup
Python
NumPy
Pandas
📖 24 Sec⏱ Ch 3
✨ NEW
MLAI Ch4: Linear Regression & Gradient Descent
Cost Function, GD from Scratch, House Price + Crop Yield Prediction
Regression
Gradient Descent
Supervised
📖 24 Sec⏱ Ch 4
✨ NEW
MLAI Ch5: Multiple & Polynomial Regression
Multi-Feature, Polynomial, Stock Market + Energy Prediction
Polynomial
Multiple Regression
📖 24 Sec⏱ Ch 5
✨ NEW
MLAI Ch6: Feature Engineering & Regularization
Scaling, Normalization, L1/L2, Ridge, Lasso, ElasticNet
Feature Engineering
Regularization
L1
📖 24 Sec⏱ Ch 6
✨ NEW
MLAI Ch7: Logistic Regression
Sigmoid, BCE, Decision Boundary — Disease + Loan Prediction
Logistic Regression
Classification
📖 24 Sec⏱ Ch 7
✨ NEW
MLAI Ch8: Multi-Class & Metrics
Softmax, Precision/Recall/F1, ROC-AUC, Confusion Matrix
Metrics
F1
ROC
📖 24 Sec⏱ Ch 8
✨ NEW
MLAI Ch9: SVM, KNN & Naive Bayes
Kernel Trick, Distance Metrics, Bayesian Learning
SVM
KNN
Naive Bayes
📖 24 Sec⏱ Ch 9
✨ NEW
MLAI Ch10: Neurons & Perceptrons
McCulloch-Pitts, Perceptron, XOR Problem, Activation Functions
Neuron
Perceptron
Activation
📖 24 Sec⏱ Ch 10
✨ NEW
MLAI Ch11: Neural Networks
MLP, Forward Prop, Universal Approximation, Hidden Layers
MLP
Neural Network
Forward Prop
📖 24 Sec⏱ Ch 11
✨ NEW
MLAI Ch12: Backpropagation & Training
Chain Rule, Computation Graphs, Optimizers, BatchNorm
Backprop
Training
Optimizers
📖 24 Sec⏱ Ch 12
✨ NEW
MLAI Ch13: Decision Trees & Random Forests
Entropy, Gini, Bagging, Feature Importance
Decision Tree
Random Forest
Ensemble
📖 24 Sec⏱ Ch 13
✨ NEW
MLAI Ch14: Ensemble Methods - Boosting & Stacking
AdaBoost, GBM, XGBoost, LightGBM, CatBoost
XGBoost
Boosting
LightGBM
📖 24 Sec⏱ Ch 14
✨ NEW
MLAI Ch15: Unsupervised Learning - Clustering
K-Means, Hierarchical, DBSCAN, GMMs
K-Means
Clustering
Unsupervised
📖 24 Sec⏱ Ch 15
✨ NEW
MLAI Ch16: Dimensionality Reduction - PCA, t-SNE, UMAP
Eigenvalues, Covariance, t-SNE, UMAP
PCA
Dimensionality
Eigenvalues
📖 24 Sec⏱ Ch 16
✨ NEW
MLAI Ch17: Cross-Validation & Model Selection
K-Fold, Grid Search, Bayesian Opt, Learning Curves
Cross-Validation
Hyperparameters
Tuning
📖 24 Sec⏱ Ch 17
✨ NEW
MLAI Ch18: Convolutional Neural Networks (CNNs)
Filters, Pooling, ResNet, VGG, ImageNet
CNN
Vision
ResNet
📖 24 Sec⏱ Ch 18
✨ NEW
MLAI Ch19: Recurrent Neural Networks & LSTMs
Time Series, BPTT, Gates, GRU
RNN
LSTM
Sequence
📖 24 Sec⏱ Ch 19
✨ NEW
MLAI Ch20: Transformers & Attention - The AI Revolution
Self-Attention, Multi-Head, BERT vs GPT
Transformer
Attention
BERT
📖 24 Sec⏱ Ch 20
✨ NEW
MLAI Ch21: Generative Adversarial Networks (GANs)
Generator, Discriminator, DCGAN, StyleGAN
GAN
Generative
StyleGAN
📖 24 Sec⏱ Ch 21
✨ NEW
MLAI Ch22: Autoencoders & Variational Inference
Encoder-Decoder, VAE, Latent Space
Autoencoder
VAE
Generative
📖 24 Sec⏱ Ch 22
✨ NEW
MLAI Ch23: Reinforcement Learning
MDP, Bellman, Q-Learning, DQN, PPO
RL
Q-Learning
MDP
📖 24 Sec⏱ Ch 23
✨ NEW
MLAI Ch24: Natural Language Processing & Text Mining
TF-IDF, Word2Vec, Sentiment Analysis, RAG
NLP
Text Mining
Embeddings
📖 24 Sec⏱ Ch 24
✨ NEW
MLAI Ch25: Computer Vision & Image Processing
YOLO, Semantic Segmentation, Pose Estimation
Vision
YOLO
Segmentation
📖 24 Sec⏱ Ch 25
✨ NEW
MLAI Ch26: Recommender Systems
Collaborative Filtering, Matrix Factorization, Deep Rec
RecSys
Collaborative
Content-Based
📖 24 Sec⏱ Ch 26
✨ NEW
MLAI Ch27: Time Series Analysis & Forecasting
ARIMA, Prophet, LSTM Forecasting
Time Series
Forecasting
ARIMA
📖 24 Sec⏱ Ch 27
✨ NEW
MLAI Ch28: MLOps & Model Deployment
CI/CD, MLflow, Docker, API Deployment
MLOps
Deployment
Docker
📖 24 Sec⏱ Ch 28
✨ NEW
MLAI Ch29: Ethics, Bias & Responsible AI
Fairness, Explainability, Deepfakes, Regulations
Ethics
Bias
Privacy
📖 24 Sec⏱ Ch 29
✨ NEW
MLAI Ch30: Graph Neural Networks & Knowledge Graphs
GCN, GAT, Knowledge Graph Embeddings
Graph
GNN
Knowledge Graph
📖 24 Sec⏱ Ch 30
✨ NEW
MLAI Ch31: Speech & Audio Processing
MFCC, Whisper, Text-to-Speech
Speech
Audio
Whisper
📖 24 Sec⏱ Ch 31
✨ NEW
MLAI Ch32: AI in Healthcare & Medicine
Medical Imaging, Drug Discovery, Genomics
Healthcare
Medical
Genomics
📖 24 Sec⏱ Ch 32
✨ NEW
MLAI Ch33: AI for Finance & FinTech
Algorithmic Trading, Fraud Detection, Credit Scoring
Finance
Trading
Fraud
📖 24 Sec⏱ Ch 33
✨ NEW
MLAI Ch34: AI Career Guide & Interview Preparation
Resume Tips, System Design, Salary Ranges
Career
Interview
Resume
📖 24 Sec⏱ Ch 34
✨ NEW
MLAI Ch35: Capstone Projects & Future of AI
5 End-to-End Projects, AGI, AI Agents
Projects
Capstone
AGI
📖 24 Sec⏱ Ch 35
Science Interactive Books

Biology, Physics & Environmental Science

2 Books
NEW
Engineering
Solid State Physics & Electronics Fundamentals

Complete 6-unit textbook: Solid State Physics, Electrical Laws, Number Systems, Combinational & Sequential Logic, Arduino & Sensors.

Physics
Electronics
Digital Logic
📖 6 Sec⏱ Self-paced
NEW
Class 8
Microorganisms & Cells

Bacteria, Fungi, Viruses, Cell Structure, Plant vs Animal Cells & Applications

Microbes
Cells
Bacteria
📖 11 Sec⏱ Class 8
Chemistry Interactive Books

Organic, Inorganic & Physical Chemistry

1 Book
NEW
Class 12
Haloalkanes & Haloarenes

Classification, Nomenclature, SN1/SN2, Elimination & Reactions of Organohalogen Compounds

Haloalkanes
SN1/SN2
Organic
📖 11 Sec⏱ Class 12
English & Kids Interactive Books

Phonics, Reading & Early Learning

4 Books
NEW
Pre-School
Little Explorers (Ages 3-4)

Colors, Shapes, Animals, Fruits, Family, Letters & Numbers — Play School & Pre-KG

Play School
Pre-KG
Ages 3-4
📖 11 Sec⏱ Ages 3-4
NEW
Pre-School
Smart Stars (Ages 5-6)

Phonics, Numbers 1-100, Shapes, Nature, Emotions, Reading & Writing — LKG & UKG

LKG
UKG
Ages 5-6
📖 12 Sec⏱ Ages 5-6
NEW
Grade 1-2
Super Learners (Ages 6-8)

Reading, Addition/Subtraction, Grammar, Multiplication, Time, Earth & Space

Grade 1
Grade 2
Reading
📖 12 Sec⏱ Grade 1-2
NEW
Grade 3
Young Scholars (Ages 8-9)

Multiplication/Division, Science, Coding, Fractions, Creative Writing & Experiments

Grade 3
Science
Coding
📖 11 Sec⏱ Grade 3

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