Acknowledgements
- Last updated
- 3 October 2026
- Applies to
- The website’s content
- Questions
- Please write to us.
Sulba stands on other people’s work. This page credits it. None of the people or companies named here endorses Sulba or is affiliated with it, and every trademark belongs to its owner.
#The NeetCode 150 and LeetCode
- The NeetCode 150 is a list of practice problems compiled by NeetCode (neetcode.io). We follow its selection and order; the explanations, drawings and solutions on this site are our own.
- The problems themselves are published on LeetCode (leetcode.com). Each problem page links to the original. We restate every problem in our own words — we do not copy LeetCode’s text — and the constraints given are facts of the problem. “LeetCode” is a trademark of LeetCode LLC.
#Electronics
Season 1 of the Electronics lessons follows the order of ideas in Make: Electronics by Charles Platt (Make Community). Its ideas are explained in our own words and drawings; no text or figures are taken from the book, and every lesson credits it. We recommend the book.
#The Sketchbook
The painting of NVIDIA’s Voyager and Endeavor buildings in Santa Clara is our own drawing, made in code, with reference to NVIDIA’s published aerial photograph of the campus (Gensler / Jason O’Rear) and the buildings’ published facts. No photograph is reproduced. “NVIDIA” is a trademark of NVIDIA Corporation.
#Mathematics
The calculus lessons and exam-style questions are our own. They follow the standard ideas of introductory calculus taught worldwide; they are not taken from any textbook, exam board or past paper.
#Typefaces
All typefaces are used under the SIL Open Font License 1.1: Caveat, Fraunces, Inter, Newsreader, JetBrains Mono, Architects Daughter, Courier Prime and Source Serif 4. They are served from this site.
#Software
| Software | Licence |
|---|---|
| Next.js and React | MIT |
| GSAP — animation | GSAP’s standard “no charge” licence |
| Lenis — smooth scrolling | MIT |
| Zustand — state | MIT |
| supabase-js — accounts | MIT |
#Trademarks
Google is a trademark of Google LLC. GitHub is a trademark of GitHub, Inc. All other names and marks belong to their owners and are used only to identify them.
#Something wrong?
If you believe something on this site infringes your rights, or credit is missing or wrong, please write to us with the page and the details. We will look into it promptly and, where appropriate, correct or remove it.