Grolier also published an annual supplement,
The New Book of Knowledge Annual which updated the encyclopedia with summaries of the events of the year. Other than the title and publisher there was no "real editorial connection to the encyclopedia". These were published from at least 1957 to 2012. A
Spanish language version of
The New Book of Knowledge,
El Nuevo Tesoro de la Juventud, was published in
Mexico City. It was intended for the Latin American market, but could also be purchased in the US and Canada. In the mid-1980s, Grolier oversaw the creation of the
Knowledge Exploration Series—a set of five
microcomputer software programs that were designed to work with the 64K
Apple II. The set cost about $300 and contained ten manuals and five backup discs. By 1993, the entire index was available on the
Grolier Master Encyclopedia Index CD-ROM with those of the
Academic American Encyclopedia and the
Encyclopedia Americana. This sold for $149 and worked on
MS-DOS,
Windows and
Macintosh. ==References==