Ключевые слова: 10, app, black, blank, business, concept, contract, design, document, education, element, equipment, file, form, glyph, icon, illustration, isolated, letter, line, list, logo, message, note, notebook, notepad, object, office, outline, pad, page, paper, pen, pencil, pictogram, school, sheet, sign, simple, study, symbol, thin, ui, web, website, white, write,