It's a universal loader scheme.
Its name is the abbreviation of (Uni)versal (O)xford (D)igital (E)ntertainment Loader.
The data tapes can be loaded on any computer (CPC, Spectrum, C64), from the moment the user has the main program for its machine.
It has been used on the games :
- Trivial Pursuit New Generation/Nouvelle génération
- Trivial Pursuit Young Players/Junior
- Trivial Pursuit Edition de Noel
- Trivial Pursuit La Revolution Française
- Yes Prime Minister
- Gazza Soccer II