Most Amazing Engine modules were released with the "AM" code prefix. The later releases (AM6 and beyond) contained the base rules (AM1) as well.
The released products, their codes and TSR product codes are:
AM1: Amazing Engine System Guide (2700)
AM2: For Faerie, Queen and Country (2701)
AM3: Bughunters (2702)
AM4: Magitech (2703)
AM5: The Galactos Barrier (2704)
AM6: Once and Future King (2707)
AM7: Metamorphosis Alpha to Omega (2708)
AM8: Kromosome (2709)
2705 was a bundle of Faerie, Queen and Country plus the System Guide.