{``Fake spaces'' with pdf\TeX\Dash the best of both worlds} {Ross Moore} {When Donald Knuth wrote \TeX\ he chose to omit space characters from the output, but instead carefully position the start of each word and punctuation character. This was to be able to better handle the idea of full-justification, as done by clever typists on manual typewriters. \TeX's visual output seems clearly superior because of this. Nowadays, however, other word-processing and text-presentation software seems to have largely abandoned full justification. Instead, window sizes can be resized causing the text to reflow on-the-fly. The presence of a space character as a word delimiter is important for this to work properly. With the 2014 version of \TeX\ Live, new primitives are included within pdf\TeX\ that allow a \cs{pdffakespace} to be inserted into the \PDF\ content stream, occurring between words and at the end of lines. This is done only at the final output, so it does not affect the high-quality positioning of words. Now when the textual content is extracted from the \PDF, by Copy/Paste or other means, a space character is indeed included in the extracted content. This is a requirement to meet \acro{PDF/A} archival standards. The author will demonstrate examples of the use of this \cs{pdffakespace}, and the other new primitives that control when and where it is used (e.g., not needed in mathematical content) for producing \acro{PDF/A} and ``Tagged \PDF'' for both archivability and accessibility. Also to be shown is how a fake space allows extra material, such as the \LaTeX\ source of inline or displayed mathematics, to be included invisibly within the \PDF. With a Select/Copy/Paste of the mathematical expression, this included source coding comes along with the pasted text.}