Codex
Quote:
The gradual replacement of the scroll by the codex has been called the most important advance in book making before the invention of the printing press. The codex transformed the shape of the book itself, and offered a form that has lasted ever since. The spread of the codex is often associated with the rise of Christianity, which early on adopted the format for the Bible. First described in the 1st century of the Common Era, when the Roman poet Martial praised its convenient use, the codex achieved numerical parity with the scroll around 300 CE, and had completely replaced it throughout what was by then a Christianized Greco-Roman world by the 6th century.
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Julius Caesar may have been the first Roman to reduce scrolls to bound pages in the form of a note-book, possibly even as a papyrus codex
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https://en.wikipedia.org/wiki/Codex
It predates the Bible by about 300 years. They sometimes cut up scrolls and made them into books.
Web pages using scrolling rather than pagination was partly historical. Computer systems were still using continuous paper till 1990s, originally rolls on Teletype (invented in 1928 and used as computer I/O from 1940s to 1980s) then later fanfold.