Electronic computer software platform that enables multiple participants to execute transactions by accepting bids and offers posted by multiple participants

Paper; Pens; Pictures; Blackboards, drawing boards and easels; Bookbinding material; Fountain pens; Framed paintings; Pen and pencil cases and boxes; Picture framing mat boards; Plastic bags for wrapping; Postcards and greeting cards; Toilet tissue; Trash bags; Watercolour paintings; Wrapping paper