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Many printers specify that they have resident fonts--often dozens of them. I could understand why this was necessary years ago, when perhaps the choice was to use a resident font or to print the whole page in raster form (assuming even that was possible.) But now, from what I can tell, PCL and PostScript both support downloading fonts from the PC to the printer. Why have resident fonts? Is there any practical advantage to them? And, if there is a reason to use them, how would I use them? For instance how could a MS Word user use the resident font, or how could I as a Linux user use them with roff, LaTeX, or something simpler like a2ps?
It turns out that programs like a2ps do not actually have font glyphs. Rather, they just come with font metrics for common PostScript fonts like Times Roman. The "metric" tells a program the sizes of the glyphs but does not actually have the glyph. A typesetting program like a2ps only needs the metrics. Then a2ps can rely on the printer (or another program, like GhostScript) to actually supply the glyphs. – Omari Norman – 2013-06-24T14:29:18.553