Digitiser V1.00 (1985)(Watford Electronics)
Watford Print ROM V0.1E (1983)(Watford Electronics)
Watford Print ROM V0.1C (1983)(Watford Electronics)
Watford Electronics DDFS V1.53 (1985)(A.C. Bray)
NLQ Designer V1.2 (1985)(Watford Electronics)
Watford Electronics DFS V1.43 (1985)(A.C. Bray)