> [...] and notebooks have embedded code in documentation since Mathematica in the 1980's. Late 80's, very late ... but the concept of "notebooks" predates Mat

> [...] and notebooks have embedded code in documentation since Mathematica in the 1980's. Late 80's, very late ... but the concept of "notebooks" predates Mathematica by at least a decade (it was very common to embed structure in source code files with markup).