[1][2][3][4] Like Sinclair's own ZX Interface 1, the DISCiPLE was a wedge-shaped unit fitting underneath the Spectrum.

The DISCiPLE was a considerable success but its sophistication (the device included 8kB of ROM)[5] meant that it was expensive and the plastic casing, located beneath the computer itself, was sometimes prone to overheating.

In later years a complete new system called UNI-DOS was developed by SD Software for the DISCiPLE and +D interfaces.

[6] In October 1993 "The Complete DISCiPLE Disassembly" was published in book form, documenting the "GDOS system 3d" version.

Usergroups like INDUG/Format in the UK or DISCiPLE-Nieuwsbrief in the Netherlands produced enhancements such as extended printer support.