Does anyone knwo what the HL means in the front of Brother printers?

The Brother™ HL-L2305W is a reliable, affordable monochrome laser printer for personal or home office use. This desk-friendly, compact printer with an up to 250-sheet capacity tray connects with ease via wireless networking or Hi-Speed USB 2.0 interface and prints crisp black and white documents at up to 24ppm*. 1-year limited warranty plus free phone support for life of your product.