also reprinted by plans services and model engineering suppliers. Books tend to discuss techniques (sometimes with detailed designs and plans), and forums are active in problem-solving and general discussion. There are also many model engineers' websites or blogs that feature their owners' current and past projects. Some model engineering webzines also exist. Annual model engineering shows and exhibitions are held around the world, organized either by local and regional clubs or professional exhibition firms. The largest exhibitions are held in London, Doncaster (previously at Harrogate), and Bristol in the UK; York, Pennsylvania in the US; and Karlsruhe in Germany. The [Miniature Engineering Craftsmanship Museum in Carlsbad, California (USA) has a permanent collection of exhibits. See also Metalworking Machining Machine Tools Steam Engine Model steam engine Model engine Glow Engines Carbureted compression ignition model engine Ridable miniature railway References External links National 2½ Inch Gauge Association 7¼ Inch Gauge Society Ten and a Quarter Inch Gauge Railway Society Society of Model and Experimental Engineers International Brotherhood of Live Steamers Metalworking Scale modeling Live steam