NIELIT O Level Syllabus 2026

Topics

Subtopics

Introduction to Computer

• Computer & IT Gadgets
• Evolution & Applications
• IT Gadgets Applications
• Hardware & Software Basics
• Central Processing Unit
• Input Devices
• Output Devices
• Memory & Storage
• Application Software
• Systems Software
• Utility Software
• Open Source vs. Proprietary
• Mobile Apps

Introduction to Operating System

• Operating System
• Basics of OS
• OS for Desktop & Laptop
• OS for Mobile & Tablets
• User Interface (UI)
• Task Bar
• Icons & Shortcuts
• Running an Application
• OS Simple Setting
• Mouse Properties
• System Date and Time
• Display Properties
• Add/Remove Programs
• Printers Management
• File & Folder Management
• File Extensions

Word Processing

• Word Processing Basics
• Opening Word Processing Package
• Title Bar
• Menu Bar
• Toolbars & Sidebar
• Creating a New Document
• Opening and Closing Documents
• Opening Documents
• Save and Save As
• Closing Document
• Using The Help
• Page Setup
• Page Layout
• Borders
• Watermark
• Print Preview
• Printing of Documents
• PDF file and Saving a Document as PDF file
• Text Creation and manipulation
• Document Creation
• Editing Text
• Text Selection
• CutCopy and Paste
• FontColorStyle and Size selection
• Alignment of Text
• Undo & Redo
• AutoCorrect
• Spelling & Grammar
• Find and Replace
• Formatting the Text
• Creating and using user defined Styles
• Paragraph Indentation
• Bullets and Numbering
• Change case
• Header & Footer
• Table Manipulation
• Insert & Draw Table
• Changing cell width and height
• Alignment of Text in cell
• Delete / Insertion of Row
• Column and Merging & Splitting of Cells
• Border and ShadingMail Merge
• Table of ContentsIndexes
• Adding Comments
• Tracking changes
• Macros

Spreadsheet

• Elements of Spread Sheet
• Creating of Spread Sheet
• Concept of Cell Address [Row and Column] and selecting a Cell
• Entering Data [text, number, date] in Cells
• Page Setup
• Printing of Sheet
• Saving Spreadsheet
• Opening and Closing
• Manipulation of Cells & Sheet
• Modifying / Editing Cell Content
• Formatting Cell (Font, Alignment, Style)
• Cut
• Copy
• Paste & Paste Special
• Changing Cell Height and Width
• Inserting and Deleting Rows
• Column
• AutoFill
• Sorting & Filtering
• Freezing panes
• Formulas
• Functions and Charts
• Using Formulas for Numbers (Addition, Subtraction, Multiplication & Division)
• AutoSum
• Functions (Sum, Count, MAX, MIN, AVERAGE)
• Sort
• Filter
• Advanced Filter
• Database Functions (DSUM, DMIN, DMAX, DCOUNT, DCOUNTA)
• What-if Analysis
• Pivot table Charts (Bar, Column, Pie, Line)
• Data Validation

Presentation

• Creation of Presentation
• Creating a Presentation Using a Template
• Creating a Blank Presentation
• Inserting & Editing Text on Slides
• Inserting and Deleting Slides in a Presentation
• Saving a Presentation
• Manipulating Slides
• Inserting Table
• Adding Pictures
• Inserting Other Objects
• Resizing and Scaling an Object
• Creating & using Master Slide
• Presentation of Slides
• Choosing a Set Up for Presentation
• Running a Slide Show
• Transition and Slide Timings
• Automating a Slide Show
• Providing Aesthetics to Slides & Printing
• Enhancing Text Presentation
• Working with Color and Line Style
• Adding Movie and Sound
• Adding Headers
• Footers and Notes
• Printing Slides and Handouts

Introduction to Internet and WWW

• Basic of Computer Networks
• Local Area Network (LAN)
• Wide Area Network (WAN)
• Network Topology
• Internet
• Concept of Internet & WWW
• Applications of Internet
• Website Address and URL
• Introduction to IP Address
• ISP and Role of ISP
• Internet Protocol
• Modes of Connecting Internet (HotSpot
• Wifi
• LAN Cable
• BroadBand
• USB Tethering)
• Identifying and uses of IP/MAC/IMEI of various devices
• Popular Web Browsers (Internet Explorer/Edge/Chrome/Mozilla Firefox/Opera etc.)
• Exploring the Internet
• Surfing the web
• Popular Search Engines
• Searching on Internet
• Downloading Web Pages
• Printing Web Pages

E-mail,Social Networking and e-Governance Services

• Structure of E-mail
• Using E-mails
• Opening Email account
• Mailbox: Inbox and Outbox
• Creating and Sending a new E-mail
• Replying to an E-mail message
• Forwarding an E-mail message
• Searching emails
• Attaching files with email
• Email Signature
• Social Networking & e-Commerce
• Facebook
• Twitter
• Linkedin
• Instagram
• Instant Messaging (Whatsapp
• Facebook Messenger
• Telegram)
• Introduction to Blogs
• Basics of E-commerce
• Netiquettes
• Overview of e-Governance Services like Railway Reservation
• Passport
• eHospital [ORS]
• Accessing e-Governance Services on Mobile Using “UMANG APP”
• Digital Locker

Digital Financial Tools and Applications

• Digital Financial Tools
• Understanding OTP [One Time Password]and QR [Quick Response] Code
• UPI [Unified Payment Interface]
• AEPS [Aadhaar Enabled Payment System]
• USSD[Unstructured Supplementary Service Data]
• Card [Credit / Debit]
• eWallet
• PoS [Point of Sale]
• Internet Banking
• National Electronic Fund Transfer (NEFT)
• Real Time Gross Settlement (RTGS)
• Immediate Payment Service (IMPS)
• Online Bill Payment

Overview of Futureskills and Cyber Security

• Introduction to Internet of Things (IoT)
• Big Data Analytics
• Cloud Computing
• Virtual Reality
• Artificial Intelligence
• Social & Mobile
• Blockchain Technology
• 3D Printing/ Additive Manufacturing
• Robotics Process Automation
• Cyber Security
• Need of Cyber Security
• Securing PC
• Securing Smart Phone 

Topics

Subtopics

Introduction to Web Design

• Introduction of Internet
• WWW
• Website
• Working of Websites
• Webpages
• Front End
• Back End
• Client and Server Scripting Languages
• Responsive Web Designing
• Types of Websites (Static and Dynamic Websites)

Editors

• Downloading free Editors like Notepad++
• Sublime Text Editor
• Making use of Editors
• File creation and editing
• Saving

HTML Basics

• HTML: Introduction, Basic Structure of HTML, Head Section and Elements of Head Section
• Formatting Tags: Bold, Italic, Underline, Strikethrough, Div, Pre Tag Anchor links and Named Anchors Image Tag, Paragraphs, Comments
• Tables: Attributes –(Border, Cellpadding, Cellspacing, height, width), TR, TH, TD, Rowspan, Colspan
• Lists: Ordered List, Unordered List, Definition List, Forms, Form Elements, Input types, Input Attributes, Text Input Text Area, Dropdown, Radio buttons, Check boxes, Submit and Reset Buttons
• Frames: Frameset, nested Frames
• HTML 5 Introduction, HTML5 New Elements: Section, Nav, Article, Aside, Audio Tag, Video Tag, HTML5 Form Validations: Require Attribute, Pattern Attribute, Autofocus Attribute, email, number type, date type, Range type, HTML embed multimedia, HTML Layout, HTML Iframe

CSS

• Introduction to CSS
• Types of CSS
• CSS Selectors: Universal Selector
• ID selector
• Tag Selector
• Class Selector
• Sub Selector
• Attribute Selector
• Group Selector
• CSS Properties: Back Ground properties
• Block Properties
• Box properties
• List properties
• Border Properties
• Positioning Properties
• CSS Lists CSS Tables
• CSS Menu Design CSS Image Gallery

CSS Framework

• Web Site Development using W3.CSS Framework
• W3.CSS Intro
• W3.CSS Colors
• W3.CSS Containers
• W3.CSS Panels
• W3.CSSBorders
• W3.CSSFonts
• W3.CSS Text
• W3.CSS Tables
• W3.CSS List
• W3.CSSImages
• W3.CSS Grid

JavaScript and Angular JS

• Introduction to Client Side Scripting Language
• Variables in Java Script
• Operators in JS
• Conditions Statements
• JS Popup Boxes
• JS Events
• Basic Form Validations in JavaScript. Introduction to Angular JS: Expressions
• Modules and Directives

Photo Editor

• Features of Photo Editing:Tools: Selection Tools
• Paint Tools
• Transform Tools
• Text Tool
• Layers
• Brightness/ Contrast
• Improve Colors and tone
• Filters

Web Publishing and Browsing

• Overview
• SGML (Standard Generalized Markup Language)
• Web Hosting Basics
• Documents Interchange Standards
• Components of Web Publishing
• Document management
• Web Page Design Considerations and Principles
• Search and Meta Search Engines
• WWW
• Browser
• HTTP
• Publishing Tools

Topics

Subtopics

Introduction to Programming

• The basic Model of computation
• algorithms
• flowcharts
• Programming Languages
• compilation
• testing & debugging and documentation

Algorithms and Flowcharts to Solve Problems

• Flow Chart Symbols
• Basic algorithms/flowcharts for sequential processing
• decision based processing and iterative processing Some examples like: Exchanging values of two variables
• summation of a set of numbers
• Decimal Base to Binary Base conversion
• Reversing digits of an integer
• GCD (Greatest Common Divisor) of two numbers
• Test whether a number is prime
• factorial computation
• Fibonacci sequence
• Evaluate ‘sin x’ as sum of a series
• Reverse order of elements of an array
• Find largest number in an array
• Print elements of upper triangular matrix

Introduction to Python

• Python Introduction
• Technical Strength of Python
• Introduction to Python Interpreter and program execution
• Using Comments, Literals, Constants, Python’s Built-in Data types
• Numbers (Integers, Floats, Complex Numbers, Real, Sets)
• Strings (Slicing, Indexing, Concatenation, other operations on Strings)
• Accepting input from Console
• Printing statements
• Simple ‘Python’ programs

Operators,Expressions and Python Statements

• Assignment statement
• expressions
• Arithmetic
• Relational
• Logical
• Bitwise operators and their precedence
• Conditional statements: if, if-else, if-elif-else; simple programs
• Notion of iterative computation and control flow –range function
• While Statement
• For loop
• break statement
• Continue Statement
• Pass statement
• else
• assert

Sequence Data Types

• Lists, tuples and dictionary, (Slicing, Indexing, Concatenation, other operations on Sequence datatype)
• Concept of mutability
• Examples to include finding the maximum, minimum, mean; linear search on list/tuple of numbers
• Counting the frequency of elements in a list using a dictionary

Functions

• Top-down approach of problem solving
• Modular programming and functions
• Function parameters
• Local variables
• the Return statement
• DocStrings
• global statement
• Default argument values
• keyword arguments
• VarArgs parameters
• Library function-input(), eval

Topics

Subtopics

Introduction to Internet of Things – Applications/Devices, Protocols and Communication Model

• Introduction - Overview of Internet of Things (IoT), the characteristics of devices and applications in IoT ecosystem, building blocks of IoT, Various technologies making up IoT ecosystem, IoT levels, IoT design methodology
• The Physical Design/Logical Design of IoT
• Functional blocks of IoT and Communication Models
• Development Tools used in IoT

Things and Connections

• Working of Controlled Systems, Real-time systems with a feedback loop, e.g., a thermostat in a refrigerator, AC, etc.
• Connectivity models – TCP/IP versus OSI model, different type of modes using wired and wireless methodology
• The process flow of an IoT application

Sensors, Actuators and Microcontrollers

• Sensor - Measuring physical quantities in digital world e.g. light sensor, moisture sensor, temperature sensor, etc.
• Actuator – moving or controlling system e.g. DC motor, different types of actuators
• Controller – Role of microcontroller as gateway to interfacing sensors and actuators, microcontroller vs microprocessor, different types of microcontrollers in embedded ecosystem

Building IoT applications

• Introduction to Arduino IDE – writing code in sketch, compiling-debugging, uploading the file to Arduino board, role of serial monitor.
• Embedded ‘C’ Language basics - Variables and Identifiers, Built-in Data Types,
• Arithmetic operators and Expressions, Constants and Literals, assignment