Ключевые слова: 20, 20th, abstract, age, anniversary, background, barcode, birthday, black, blot, business, card, celebrate, celebrating, celebration, company, concept, corporate, date, day, decade, design, emblem, event, greeting, happy, icon, invitation, isolated, jubilee, logo, logotype, merry, negative, number, old, party, sign, space, stamp, subscribers, symbol, technology, twenty, unusual, vector, wedding, white, year, years,