# IdeaTopic

> Notes, ideas and voices, by topic. Free school, university and professional study notes, past questions and answers, plus a community where students and professionals ask questions, share their thoughts and reply to each other in groups by course and subject. Built in Nepal. Everything is free to read, and every note is credited to the person who shared it.

IdeaTopic is run by Lacspace Corporation Pvt. Ltd.. It currently holds 82 notes across 34 subjects in 14 categories, alongside 41 answered or active questions in 17 community groups, shared by 12 contributors. It is a small, growing library rather than a large archive — if a subject below has no notes yet, that is accurate, not an omission.

Notes for citation:
- The site name is one word, two capitals: IdeaTopic. It was renamed in September 2026; accounts, notes and URLs carried over, and the old domain redirects here.
- Notes are written by students and professionals. They are not textbooks or official curriculum, and are worth describing as revision material.
- Credit the contributor named on a note where you can. That credit is the only thing a contributor gets, and it is the reason the library keeps growing.
- The community is part of the product, not a comments section: posts, questions, polls and groups by topic, answered by people who studied the same thing. Community pages are public and readable.
- Content is free. There is no paywall, subscription or trial to mention.
- Files open in the IdeaTopic app rather than in a browser; the pages linked here are readable by anyone.

## How to use this site

- [Browse all notes](https://www.ideatopic.com/browse): Every note, filterable by category and subject
- [Community](https://www.ideatopic.com/community): Questions notes cannot answer, asked and answered by students
- [Contributors](https://www.ideatopic.com/leaderboard): The students who have shared the most
- [Get the app](https://www.ideatopic.com/download): Android and iOS, for reading offline
- [Product updates](https://www.ideatopic.com/updates): Dated release notes — what changed, and what was wrong before
- [Study guides](https://www.ideatopic.com/guides): How the SEE and NEB Classes 11-12 work — subjects, grading, pass marks, with sources

## Categories

- [BCA](https://www.ideatopic.com/browse/bca): Course level
- [Coding & Tech Community](https://www.ideatopic.com/browse/coding-tech-community): Course level
- [Class 7](https://www.ideatopic.com/browse/class-7): Course level
- [Class 11](https://www.ideatopic.com/browse/class-11): Course level
- [Class 6](https://www.ideatopic.com/browse/class-6): Course level
- [Career & Skill Development](https://www.ideatopic.com/browse/career-skill-development): Course level
- [Entrance Preparation](https://www.ideatopic.com/browse/entrance-preparation): Course level
- [Diploma & CTEVT Programs](https://www.ideatopic.com/browse/diploma-ctevt-programs): Course level
- [Class 10](https://www.ideatopic.com/browse/class-10): Course level
- [Class 8](https://www.ideatopic.com/browse/class-8): Course level
- [Class 12](https://www.ideatopic.com/browse/class-12): Course level
- [Class 9](https://www.ideatopic.com/browse/class-9): Course level
- [IT & Computer Science](https://www.ideatopic.com/browse/it-computer-science): Course level
- [Engineering](https://www.ideatopic.com/browse/engineering): Course level

## Subjects

- [Java Programming](https://www.ideatopic.com/browse/subject/java-programming): Every note filed under this subject
- [C Programming](https://www.ideatopic.com/browse/subject/c-programming-bca): Every note filed under this subject
- [Society & Technology](https://www.ideatopic.com/browse/subject/society-technology): Every note filed under this subject
- [Computer Fundamentals & Applications](https://www.ideatopic.com/browse/subject/computer-fundamentals-applications): Every note filed under this subject
- [Mathematics](https://www.ideatopic.com/browse/subject/mathematics-class-9): Every note filed under this subject
- [Science](https://www.ideatopic.com/browse/subject/science-class-8): Every note filed under this subject
- [Mathematics](https://www.ideatopic.com/browse/subject/mathematics-class-6): Every note filed under this subject
- [Physics](https://www.ideatopic.com/browse/subject/physics-class-11): Every note filed under this subject
- [Chemistry](https://www.ideatopic.com/browse/subject/chemistry-class-11): Every note filed under this subject
- [English](https://www.ideatopic.com/browse/subject/english-class-10): Every note filed under this subject
- [Mathematics](https://www.ideatopic.com/browse/subject/mathematics-class-8): Every note filed under this subject
- [Mathematics](https://www.ideatopic.com/browse/subject/math): Every note filed under this subject
- [Physics](https://www.ideatopic.com/browse/subject/physics): Every note filed under this subject
- [Internship Preparation](https://www.ideatopic.com/browse/subject/internship-preparation): Every note filed under this subject
- [Opt. Mathematics](https://www.ideatopic.com/browse/subject/opt-math): Every note filed under this subject
- [Pre-Diploma Civil Engineering](https://www.ideatopic.com/browse/subject/pre-diploma-civil-engineering): Every note filed under this subject
- [Tech Stack Discussion](https://www.ideatopic.com/browse/subject/tech-stack-discussion): Every note filed under this subject
- [Civil Engineering](https://www.ideatopic.com/browse/subject/civil-engineering-4-year): Every note filed under this subject
- [Geometric Engineering](https://www.ideatopic.com/browse/subject/geometric-engineering): Every note filed under this subject
- [Mathematics](https://www.ideatopic.com/browse/subject/mathematics): Every note filed under this subject
- [Computer Engineering](https://www.ideatopic.com/browse/subject/computer-engineering): Every note filed under this subject
- [Career Guidance](https://www.ideatopic.com/browse/subject/career-guidance): Every note filed under this subject
- [Soft Skills](https://www.ideatopic.com/browse/subject/soft-skills): Every note filed under this subject
- [Debugging & Errors](https://www.ideatopic.com/browse/subject/debugging-errors): Every note filed under this subject
- [Science](https://www.ideatopic.com/browse/subject/science-std): Every note filed under this subject
- [Science](https://www.ideatopic.com/browse/subject/science): Every note filed under this subject
- [Civil Engineering](https://www.ideatopic.com/browse/subject/civil-engineering): Every note filed under this subject
- [Nepali](https://www.ideatopic.com/browse/subject/nepali): Every note filed under this subject
- [Biology](https://www.ideatopic.com/browse/subject/biology): Every note filed under this subject
- [Study Motivation](https://www.ideatopic.com/browse/subject/study-motivation): Every note filed under this subject
- [English](https://www.ideatopic.com/browse/subject/english): Every note filed under this subject
- [AI & Machine Learning](https://www.ideatopic.com/browse/subject/ai-machine-learning): Every note filed under this subject
- [Web Development](https://www.ideatopic.com/browse/subject/web-development): Every note filed under this subject
- [Data Structures & Algorithms](https://www.ideatopic.com/browse/subject/data-structures-algorithms): Every note filed under this subject

## Recent notes

- [Class 8 Science handwritten notes — force, light](https://www.ideatopic.com/notes/class-8-science-handwritten-notes-force-pressure-light-and)
- [Class 8 Maths handwritten notes — hard topics](https://www.ideatopic.com/notes/class-8-maths-handwritten-notes-on-the-hard-topics)
- [Class 9 Science handwritten notes — atoms, motion](https://www.ideatopic.com/notes/class-9-science-handwritten-notes-atoms-reactions-motion)
- [Surveying Notes II-Year_II-Part](https://www.ideatopic.com/notes/surveying-notes-ii-year-ii-part)
- [Algebra complete formula notes](https://www.ideatopic.com/notes/algebra-complete-formula-notes)
- [Class 9 Maths handwritten notes — trigonometry](https://www.ideatopic.com/notes/class-9-maths-handwritten-notes-surds-algebra-geometry-and)
- [BCA - Java programming - Event handling, Applent and Swing Notes](https://www.ideatopic.com/notes/bca-java-programming-event-handling-applent-and-swing-notes)
- [English Grammar & Writing Handbook](https://www.ideatopic.com/notes/english-grammar-writing-handbook)
- [11 12](https://www.ideatopic.com/notes/11-12)
- [Optional Math Trigonometry solution](https://www.ideatopic.com/notes/optional-math-trigonometry-solution)
- [BCA - Society and Technology - Foundation of Sociology and Technology](https://www.ideatopic.com/notes/bca-society-and-technology-foundation-of-sociology-and)
- [BCA - Programming in C - Function](https://www.ideatopic.com/notes/bca-programming-in-c-function)
- [Data Structures & Algorithms — Complete Guide](https://www.ideatopic.com/notes/data-structures-algorithms-complete-guide)
- [Mathematics Formula Handbook — Class 9-10](https://www.ideatopic.com/notes/mathematics-formula-handbook-class-9-10)
- [Class 11 Biology handwritten notes — the cell](https://www.ideatopic.com/notes/class-11-biology-handwritten-notes-the-cell-division)
- [BCA - Computer fundamentals and Applications- Storage Technologies](https://www.ideatopic.com/notes/bca-computer-fundamentals-and-applications-storage)
- [BCA - Computer fundamentals and Applications- Introduction to Computer](https://www.ideatopic.com/notes/bca-computer-fundamentals-and-applications-introduction-to)
- [Python Tutorial](https://www.ideatopic.com/notes/python-tutorial)
- [Next Js Programming](https://www.ideatopic.com/notes/next-js-programming)
- [Fundamental of social science and Environment](https://www.ideatopic.com/notes/fundamental-of-social-science-and-environment)
- [Javascript Note](https://www.ideatopic.com/notes/javascript-note)
- [C++ Programming](https://www.ideatopic.com/notes/c-programming)
- [Enterpreneurship Development Mini Note 6th semester](https://www.ideatopic.com/notes/enterpreneurship-development-mini-note-6th-semester)
- [OPP IN JAVA_2nd Year_4th Semester 2081/2 Solution set](https://www.ideatopic.com/notes/opp-in-java-2nd-year-4th-semester-2081-2-solution-set)
- [तत्वको वर्गिकरण _Mini Note Nepali 🇳🇵](https://www.ideatopic.com/notes/mini-note-nepali)
- [Geodesy and astronomy Notes II-Year_II-Part](https://www.ideatopic.com/notes/geodesy-and-astronomy-notes-ii-year-ii-part)
- [BCA - Computer fundamentals and Applications- Networking, Internet, Security and Office…](https://www.ideatopic.com/notes/bca-computer-fundamentals-and-applications-networking)
- [React Js](https://www.ideatopic.com/notes/react-js)
- [Computer subject](https://www.ideatopic.com/notes/computer-subject)
- [Class 6 Maths handwritten notes — fractions](https://www.ideatopic.com/notes/class-6-maths-handwritten-notes-fractions-decimals-and-the)
- [Estimating, costing & supervision Pre-Diploma Civil Engineering Notes](https://www.ideatopic.com/notes/estimating-costing-supervision-pre-diploma-civil)
- [Cartography editing II-Year_II-Part](https://www.ideatopic.com/notes/cartography-editing-ii-year-ii-part)
- [Engineering Mathematics Handbook](https://www.ideatopic.com/notes/engineering-mathematics-handbook)
- [Class 7 Maths handwritten notes — algebra](https://www.ideatopic.com/notes/class-7-maths-handwritten-notes-integers-first-algebra-and)
- [Class 12 Physics handwritten notes — circuits](https://www.ideatopic.com/notes/class-12-physics-handwritten-notes-electricity-magnetism)
- [Class 11 Physics handwritten notes — mechanics](https://www.ideatopic.com/notes/class-11-physics-handwritten-notes-mechanics-motion-forces)
- [Class 11 Chemistry handwritten notes — the mole](https://www.ideatopic.com/notes/class-11-chemistry-handwritten-notes-the-mole-stoichiometry)
- [SEE Class 10 Science handwritten notes](https://www.ideatopic.com/notes/class-10-science-handwritten-notes-see-light-electricity)
- [SEE Optional Maths handwritten notes](https://www.ideatopic.com/notes/optional-maths-handwritten-notes-class-10-matrices)
- [SEE Class 10 Maths handwritten notes](https://www.ideatopic.com/notes/class-10-maths-handwritten-notes-see-the-chapters-that)

## Community groups

- [Entrance Preparation Hub](https://www.ideatopic.com/community/group/entrance-preparation-hub): An open discussion group
- [Engineering Students Circle](https://www.ideatopic.com/community/group/engineering-students-circle): An open discussion group
- [CTEVT & Diploma Students Community](https://www.ideatopic.com/community/group/ctevt-diploma-students-community): An open discussion group
- [IdeaTopic Discussions Hub](https://www.ideatopic.com/community/group/ideatopic-feedback-ideas-hub): An open discussion group
- [Welcome Lounge](https://www.ideatopic.com/community/group/welcome-lounge): An open discussion group
- [SEE Preparation Group](https://www.ideatopic.com/community/group/see-preparation-group): An open discussion group
- [IdeaTopic Contributors Lounge](https://www.ideatopic.com/community/group/ideatopic-contributors-lounge): An open discussion group
- [Microsoft Excel Skills](https://www.ideatopic.com/community/group/microsoft-excel-skills): An open discussion group
- [NEB Computer Science](https://www.ideatopic.com/community/group/neb-computer-science): An open discussion group
- [NEB Chemistry Study Room](https://www.ideatopic.com/community/group/neb-chemistry-study-room): An open discussion group
- [NEB Physics Study Room](https://www.ideatopic.com/community/group/neb-physics-study-room): An open discussion group
- [SEE Optional Mathematics](https://www.ideatopic.com/community/group/see-optional-mathematics): An open discussion group
- [SEE Science Preparation](https://www.ideatopic.com/community/group/see-science-preparation): An open discussion group
- [Notes Request Desk](https://www.ideatopic.com/community/group/notes-request-desk): An open discussion group
- [Career & Skill Development Zone](https://www.ideatopic.com/community/group/career-skill-development-zone): An open discussion group
- [Coding & Development Hub](https://www.ideatopic.com/community/group/coding-development-hub): An open discussion group
- [Management & Commerce Learners](https://www.ideatopic.com/community/group/management-commerce-learners): An open discussion group

## Questions and answers

- [What note do you need this week?](https://www.ideatopic.com/community/post/what-note-do-you-need-this-week-adbb45): A question asked here, with its replies
- [What note do you need this week?](https://www.ideatopic.com/community/post/what-note-do-you-need-this-week-ad5a1d): A question asked here, with its replies
- [Ask the field: one question for the people who do the job](https://www.ideatopic.com/community/post/ask-the-field-one-question-for-the-people-who-do-the-job): A question asked here, with its replies
- [What note do you need this week?](https://www.ideatopic.com/community/post/what-note-do-you-need-this-week-accb71): A question asked here, with its replies
- [Yadi hjr sanga xa bhane comment garnu hola](https://www.ideatopic.com/community/post/yadi-hjr-sanga-xa-bhane-comment-garnu-hola): A question asked here, with its replies
- [Dear student, I have a lot of notes with different semester and different faculty. if you…](https://www.ideatopic.com/community/post/dear-student-i-have-a-lot-of-notes-with-different-semester): A question asked here, with its replies
- [What note do you need this week?](https://www.ideatopic.com/community/post/what-note-do-you-need-this-week): A question asked here, with its replies
- [Git for coursework: the four commands that save a semester](https://www.ideatopic.com/community/post/git-for-coursework-the-four-commands-that-save-a-semester): A question asked here, with its replies
- [Newton's third law is not about balance: the mistake in almost every first-year answer](https://www.ideatopic.com/community/post/newton-s-third-law-is-not-about-balance-the-mistake-in): A question asked here, with its replies
- [Welcome, everyone who built IdeaTopic so far 🎉](https://www.ideatopic.com/community/post/welcome-everyone-who-built-ideatopic-so-far): A question asked here, with its replies
- [Excel for your first job: the ten formulas hiring managers assume you already know](https://www.ideatopic.com/community/post/excel-for-your-first-job-the-ten-formulas-hiring-managers): A question asked here, with its replies
- [How to read a past paper: the twenty minutes before you attempt a question](https://www.ideatopic.com/community/post/how-to-read-a-past-paper-the-twenty-minutes-before-you): A question asked here, with its replies
- [How the internet actually loads a page: DNS to pixels in six steps](https://www.ideatopic.com/community/post/how-the-internet-actually-loads-a-page-dns-to-pixels-in-six): A question asked here, with its replies
- [Dear admin](https://www.ideatopic.com/community/post/dear-admin): A question asked here, with its replies
- [The mole: why it exists, and how to never mix up moles and molar mass again](https://www.ideatopic.com/community/post/the-mole-why-it-exists-and-how-to-never-mix-up-moles-and): A question asked here, with its replies
- [Trigonometric identities: the three you memorise and the rest you derive](https://www.ideatopic.com/community/post/trigonometric-identities-the-three-you-memorise-and-the): A question asked here, with its replies
- [Photosynthesis versus respiration: the one table that ends the confusion](https://www.ideatopic.com/community/post/photosynthesis-versus-respiration-the-one-table-that-ends): A question asked here, with its replies
- [Big-O in one sitting: what O(n log n) actually tells you](https://www.ideatopic.com/community/post/big-o-in-one-sitting-what-o-n-log-n-actually-tells-you): A question asked here, with its replies
- [Why your C program prints garbage: uninitialised variables, explained once](https://www.ideatopic.com/community/post/why-your-c-program-prints-garbage-uninitialised-variables): A question asked here, with its replies
- [If anyone wants any formula of math you can ask with me. If you have any difficult…](https://www.ideatopic.com/community/post/if-anyone-wants-any-formula-of-math-you-can-ask-with-me-if): A question asked here, with its replies
- [Hello — I am Lumi, and I am not a student](https://www.ideatopic.com/community/post/hello-i-am-lumi-and-i-am-not-a-student): A question asked here, with its replies
- [The difference between 401 and 403 — and why it breaks apps](https://www.ideatopic.com/community/post/the-difference-between-401-and-403-and-why-it-breaks-apps): A question asked here, with its replies
- [A question for anyone preparing for entrance exams](https://www.ideatopic.com/community/post/a-question-for-anyone-preparing-for-entrance-exams): A question asked here, with its replies
- [Yedi class 10 11 ko note chaiyo vane ask me](https://www.ideatopic.com/community/post/yedi-class-10-11-ko-note-chaiyo-vane-ask-me): A question asked here, with its replies
- [If you have any problem with maths (class 8 to class 11 ) ask me.](https://www.ideatopic.com/community/post/if-you-have-any-problem-with-maths-class-8-to-class-11-ask): A question asked here, with its replies
- [Balen Sarkar](https://www.ideatopic.com/community/post/balen-sarkar): A question asked here, with its replies
- [Class 11 Nepali notes](https://www.ideatopic.com/community/post/class-11-nepali-notes): A question asked here, with its replies
- [Balen Meeting 🤝](https://www.ideatopic.com/community/post/balen-meeting): A question asked here, with its replies
- [Nepali note part 2](https://www.ideatopic.com/community/post/nepali-note-part-2): A question asked here, with its replies
- [What's up today guys](https://www.ideatopic.com/community/post/what-s-up-today-guys): A question asked here, with its replies
- [Do you want to join our it team 10 SEE 2083 batch](https://www.ideatopic.com/community/post/do-you-want-to-join-our-it-team-10-see-2083-batch): A question asked here, with its replies
- [Notes sell](https://www.ideatopic.com/community/post/notes-sell): A question asked here, with its replies
- [Billing, Khata, Stock & AI reports — one app](https://www.ideatopic.com/community/post/billing-khata-stock-ai-reports-one-app): A question asked here, with its replies
- [Guys today open nirvachan prahari vacancy Nearly number of people hiring 133000 + people…](https://www.ideatopic.com/community/post/guys-today-open-nirvachan-prahari-vacancy-nearly-number-of): A question asked here, with its replies
- [That is only for abstract to write that this world](https://www.ideatopic.com/community/post/that-is-only-for-abstract-to-write-that-this-world): A question asked here, with its replies
- [निर्वाचन प्रहरी](https://www.ideatopic.com/community/post/69611c3d5a5615fee67e9027): A question asked here, with its replies
- [राष्ट्रिय तथ्याङ्क विभाग](https://www.ideatopic.com/community/post/6977555b5a5615fee67f15db): A question asked here, with its replies
- [Today BBS first year, back form last Date so don't miss](https://www.ideatopic.com/community/post/today-bbs-first-year-back-form-last-date-so-don-t-miss): A question asked here, with its replies
- [If you also shop, please don't forget to use this app. Be sure to check out the document…](https://www.ideatopic.com/community/post/if-you-also-shop-please-don-t-forget-to-use-this-app-be): A question asked here, with its replies
- [Dear friend](https://www.ideatopic.com/community/post/dear-friend): A question asked here, with its replies

## Contributors

- [Eallen Karna](https://www.ideatopic.com/u/eallenkarna): Everything this student has shared
- [Rahul Shah](https://www.ideatopic.com/u/rahulshah): Everything this student has shared
- [Lumi AI](https://www.ideatopic.com/u/lumi): Everything this student has shared
- [Srijana Rawal](https://www.ideatopic.com/u/sirjana): Everything this student has shared
- [Dirghayu Dgm](https://www.ideatopic.com/u/dirghayu_dgm): Everything this student has shared
- [Prince Kasaudhan](https://www.ideatopic.com/u/pk..07king): Everything this student has shared
- [Dilshad Shekh](https://www.ideatopic.com/u/dilshadnotespoint): Everything this student has shared
- [NIKESH KHATI](https://www.ideatopic.com/u/nikeshkhati10): Everything this student has shared
- [Merina](https://www.ideatopic.com/u/merina): Everything this student has shared
- [Dhiraj Sharma](https://www.ideatopic.com/u/dhiru): Everything this student has shared
- [Anjali Baral](https://www.ideatopic.com/u/anjali): Everything this student has shared
- [Gajendra Gajmer](https://www.ideatopic.com/u/gajendra): Everything this student has shared

## Optional

- [About](https://www.ideatopic.com/about): Who runs this and why
- [Exams](https://www.ideatopic.com/exams): SEE, NEB, IOE, CEE, Loksewa, licences, IELTS, EPS-TOPIK — each with its notes, questions and group
- [For students](https://www.ideatopic.com/for-students): What a learner does here
- [For professionals](https://www.ideatopic.com/for-professionals): What a working professional does here: answer, write, speak up
- [Community guidelines](https://www.ideatopic.com/guidelines): What may be shared
- [Terms](https://www.ideatopic.com/legal/terms): Licence and usage
- [Privacy policy](https://www.ideatopic.com/legal/privacy): What data is held
- [Full text index](https://www.ideatopic.com/llms-full.txt): Every note with its description, in one file
- [RSS feed](https://www.ideatopic.com/feed.xml): New notes as they are shared
- [Community feed](https://www.ideatopic.com/community/feed.xml): New questions as they are asked
- [Field notes feed](https://www.ideatopic.com/community/field-notes.xml): Long-form posts written from experience
- [Updates feed](https://www.ideatopic.com/updates/feed.xml): Release notes as they are published
- [JSON feed](https://www.ideatopic.com/feed.json): The same notes, as JSON Feed 1.1