1z Library

: It is a utility library for developers working with C++17 (often referred to by its development name, "1z").

1z Library (often called 1lib, 1lib dot org, or variations) is a widely known online repository that indexes and distributes millions of books, academic papers, and other written works—often including copyrighted titles—without publishers’ or authors’ permission. It’s part of a family of large shadow libraries that make paywalled or out-of-print texts freely available to anyone with an internet connection. 1z library

The 1z library can be compared to other libraries, such as: : It is a utility library for developers