Stationer's Supply is a type of business that provides customers with a variety of stationery items such as PENS, notepaper, envelopes, and artpaper. PENS are writing instruments used to create written words, while notepaper is a type of paper used for writing notes or letters. Envelopes are used to contain and protect documents, and artpaper is a type of paper used for drawing and painting. All of these items are essential for any stationer's supply store.