HWB

Noun

 * 1)   device specialized type of computer hard disk controller
 * 2)   a cylindrical-coordinate representation of points in an RGB color model
 * 3)   a website and collection of online tools provided to all schools in Wales, UK

Noun

 * 1)   number that categorizes the energy loss of a building
 * 2)   a railway line in Trier, Germany