Notes worth keeping, kept simple.

NOTES. is a small, independently maintained archive of clean PDF study notes. It started as a personal collection — interview prep, course material, and reference sheets written or gathered while studying software testing, cloud security, and computer science — and it's shared here so anyone else working through the same topics can use it too.

There are no accounts, no paywalls, and no algorithmic feed. Every note can be previewed in the browser or downloaded directly as a PDF, organised by subject, and searched by title or topic.

What's inside

The archive currently spans interview preparation (Java, REST Assured, Jenkins CI/CD, AWS cloud security), core computer science fundamentals (data structures, algorithms), and general study notes across mathematics, physics, chemistry, biology, and history. It grows slowly and deliberately — each note is added individually, not scraped or auto-generated.

Where the content comes from

Notes are either written directly for this archive or compiled from personal study material, with authorship credited where the source differs from the site maintainer. If you believe something here is used incorrectly or without proper credit, please get in touch via the contact page and it will be corrected or removed promptly.

Who runs this

NOTES. is maintained by a single person, not a company or editorial team. It's a side project built for clarity and usefulness rather than scale — hence the black-and-white design and the absence of tracking-heavy features.