# zlib ## Identification A foundational lossless compression library appearing in multiple dependency chains. ## Notebook evidence - [[Scanned_20260730-1946|Scanned_20260730-1946]], PDF pages 2 and 7. ## Relationships and evidentiary boundary [[Zstandard]] · [[XZ Utils]] · [[Software Bill of Materials]]. The notebook occurrence preserves a historical compatibility or software clue. It does not alone prove installation, use, ownership, provenance, or the exact identification of uncertain handwriting.