ペラ (Paper) is a thin material made from cellulose fibers, commonly derived from wood, rags, or grasses. It is used for writing, printing, and packaging, among other purposes. The invention of paper is attributed to Cai Lun, a Chinese court official, in the 2nd century AD, which revolutionized communication and record-keeping. There are various types of paper, including bond paper, newsprint, and cardstock, each designed for specific uses. The production process involves pulping the raw materials, forming sheets, and drying them. Today, paper remains an essential medium in both digital and traditional forms of communication.