What is "whsmith"

WHSmith plc (also known as WHS or colloquially as Smith's, and formerly W. H. Smith & Son) is a British retailer which operates a chain of high street, railway station, airport, port, hospital and motorway service station shops selling books, stationery, magazines, newspapers and entertainment products. Its headquarters are in Swindon, Wiltshire. Smith's is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index. It was the first chain store company in the world, and was responsible for the creation of the ISBN book catalogue system.