Some hobbyists obtain masks from established hobbyist mask studios. These are all created by hobbyists and marketed to the hobbyist/collector community. Hardware offerings range from complete systems in cases to kits for hobbyist DIY constructors. His father was an enthusiastic computer hobbyist. Many hobbyist indie developers create mods of existing games. These are also available as kits for hobbyist DIY constructors. The terms amateur and hobbyist are often used interchangeably. They are also commonly used by amateur and hobbyist blacksmiths. Regulations apply to both hobbyist and professional users. Like the S5, it was developed for the professional market and not the casual hobbyist. One who is a hobbyist or general admirer of flags is a vexillophile. Rose was a live steam hobbyist, with his own backyard railroad. Beyond music, he is a graphic illustrator, toy soldier hobbyist, and designer of board games. Electronic kits for scrambling and descrambling are available from hobbyist suppliers. There were also machines for engineering development and hobbyist personal use.