They shouldn’t use numbers at all tbh. QQVGA, QVGA, VGA, q(uarter)HD, HD, Full HD, QHD, UHD and so on works for all aspect ratios, and you can even specify by adding prefixes like FW (full wide) VGA would be 480p at 16:9. It gets a little confusing cause sometimes the acronyms change (and PAL throws a wrench on everything), but the system works.