When trying to buy a Raspberry Pi 3 Model B from the official raspberrypi.org products page (using the "or buy for business" link underneath the large "Buy now" button), I get sent to this specific product on the UK Farnell Element14 site.
The product description is RASPBERRYPI3-MODB-1GB - Evaluation Board, Raspberry Pi 3 Model B, Quad Core 1.2GHz CPU, 1GB RAM, WiFi/BLE, 40 GPIO Pins.
Why is the RPI described as being an evaluation board, and what does that mean exactly? Is there a "regular" board floating around?