Commercially, big-box concept/stores can be broken down into two categories: general merchandise (examples include Walmart and Target), and specialty stores (such as Menards, Barnes and Noble, or Best Buy) which specialize in goods within a specific range, such as hardware, books, or electronics. In recent years, many traditional retailers—such as Tesco and Praktiker—have opened stores in the big-box-store format in an effort to compete with big-box chains, which are expanding internationally as their home markets reach maturity.