Ключевые слова: abstract, accounting, background, business, button, calculate, calculator, color, colorful, communication, computer, concept, contour, design, digital, display, education, electronic, element, filled, finance, financial, flat, graphic, icon, illustration, image, interface, isolated, keyboard, line, linear, lineart, math, mathematics, modern, number, object, office, outline, school, sign, simple, symbol, technology, web,