Memium is a TypeScript library that lets developers define and manipulate binary structs, unions, and (future) pointers directly on `ArrayBuffer`s, mirroring C‑style memory layout with features like packing, alignment, inheritance, and counted arrays. It targets TypeScript developers who need high‑performance, low‑level binary data handling—such as game engines, networking protocols, or custom file format parsers—while keeping a familiar, decorator‑based API.