The filesystem described here is used with the MGT DISCiPLE, +D and SAM Coupé. There are several DOSes which use this filesystem (and extensions thereof), including: Floppy-based * GDOS (DISCiPLE) * G+DOS (+D) * SAMDOS (SAM Coupé) * UniDOS (DISCiPLE / +D) * Beta DOS (DISCiPLE / +D) * Master DOS (SAM Coupé) Hard-disk-based * B-DOS (SAM Coupé with Atom) * HDOS (SAM Coupé with SD IDE) * EDOS (SAM Coupé with Entropy IDE interface — abandoned) * +DivIDE (ZX Spectrum with DivIDE) * Plus D'lux patched GDOS/Uni-DOS (ZX Spectrum with Plus D'lux)