TDI Software Limited

TDI Software Limited were based in Bristol and produced programs for writing p-system code for the QL.

On the QL they released:

• Advanced Development Toolkit - a full set of productivity tools
• TDI Assembler
• UCSD Fortran77 - compatible with the standard Fortran-77 implementation
• UCSD Pascal - compatible with UCSD Pascal developed for a range of machines by the Regents of the University of California.
• USCD PSystem
• USCD Prolog