Ключевые слова: alphabet, art, background, business, button, centimeter, contour, crossed, design, document, drawing, education, element, equipment, extension, file, flat, font, format, icon, id, illustration, instrument, isolated, length, letter, line, linear, lineart, measure, measurement, object, outline, pencil, ruler, scale, school, sign, straightedge, symbol, text, tool, type, typography, web, word,