A broad range of peripherals exist for the Dragon 32/64, and there are add-ons such as the Dragon's Claw which give the Dragons a port that is hardware-compatible with the BBC Micro's user port, though separate software drivers for connected devices must be developed. Although neither machine has a built-in disk operating system (Compact Cassettes being the standard storage mechanism commonly used for machines of the time), DragonDOS was supplied as part of the disk controller interface from Dragon Data Ltd. The versatile external ports, including the standard RS-232 on the 64, also allows hobbyists to attach a diverse range of equipment.