In addition, there was the simple issue of bookbinding.
Some producers of manuals had a "style" that demanded that every chapter
MUST start on an odd numbered page. That would force close to half of the
preceding chapters to be padded out with an extra page for alignment.
In addition, the "signatures" for bookbinding are fixed sizes, typically
16 pages. If they wanted a section to start in a fresh signature, it
required padding.
The phrase "this page intentionally left blank" was necessary to make it
clear that a page was padding, not a printing error: "this page
accidentally left blank".
On Tue, 14 Jan 2003, Tillman, Edward wrote:
The "this page left blank" was a borrow from
military 'technical orders.'
Though quite stodgy about their regs t times, they mostly new that
improvements and innovations would soon render a fixed document obsolete.
So, they kept them in binders, replaced outdated pages with updated ones,
and kept the "blank" pages as place holders (0's, if you like) for
expansion
beyond the then current document/section/segment length. Clear as mud?
Cheers!