- SOFT157 - The Concise CPC464 BASIC Specification
- SOFT158 - The Concise CPC464 Firmware Specification
- Soft158A: DDI-1 Firmware - The Complete CPC 464 DOS ROM Specification
- Soft968: CPC 464/664/6128 Firmware
- SOFT981M - Amstrad Computer User T-Shirt
Further SOFT numbers (for games/utilities) are found on the AMSOFT page.