From their website:
Horizon Hobby is an international developer, marketer and distributor of radio control (RC) hobby products, model trains and a wide range of educational, toy and other hobby products.
Short and simple, the Horizon Hobby mission statement is a reflection of our ultimate goal. We are continuously striving to accomplish this mission through innovative product development and distribution efforts that are supported not only by cutting-edge retailer services, but also by direct-to-consumer marketing through print media and e-commerce. Our extensive marketing, sales and shipping resources are second-to-none in the hobby distribution business.