| Board | Model | Description | Pages | TIF | |
| model400-idx | 400 | Model 400 System | 1 | model400-idx.pdf | model400-idx.tif |
| 5977 | 184,185,704 | Card Reader | 1 | 5977.pdf | 5977.tif |
| 6023 | 400 | ROM Control | 2 | 6023.pdf | 6023.tif |
| 6024 | 400 | Main Processor | 1 | 6024.pdf | 6024.tif |
| 6025 | 400 | Memory Board | 2 | 6025.pdf | 6025.tif |
| 6026 | 400 | 4 Bit ROM | 1 | 6026.pdf | 6026.tif |
| 6027 | 400 | Display Logic | 1 | 6027.pdf | 6027.tif |
| 6028-1 | 400 | Model 85 Keyboard | 1 | 6028-1.pdf | 6028-1.tif |
| 6028-2 | 400 | Model 450,452,462 Keyboard | 1 | 6028-2.pdf | 6028-2.tif |
| 6029 | 400 | 20 Bit ROM & Motherboard | 3 | 6029.pdf | 6029.tif |
| 6030 | 400 | description | 1 | 6030.pdf | 6030.tif |
| 6244 | 400L | Power Supply and Motherboard | 2 | 6244.pdf | 6244.tif |
| 6245-1 | 400L | RAM/ROM | 1 | 6245-1.pdf | 6245-1.tif |
| 6246-1 | 400L | Keyboard | 1 | 6246-1.pdf | 6246-1.tif |
| 6246-2(6342) | 400L | Keyboard (6342) | 1 | 6246-2(6342).pdf | 6246-2(6342).tif |
| 6252 | 400L | RAM/ROM | 1 | 6252.pdf | 6252.tif |
| 6253-1 | 400 | Card Reader | 1 | 6253-1.pdf | 6253-1.tif |
| 6253-C | 400L | Card Reader | 1 | 6253-C.pdf | 6253-C.tif |
| 6256 | 400L | 4 Bit ROM (Intel 1702) | 1 | 6256.pdf | 6256.tif |
| 6265 | 400L | RAM/ROM | 1 | 6265.pdf | 6265.tif |
| Board | Model | Description | Pages | TIF | |
| 6266 | 400L | Algebraic Keyboard (C72) | 1 | 6266.pdf | 6266.tif |
| 6267 | 400 | Memory Board | 1 | 6267.pdf | 6267.tif |
| 6280-1 | 400/2214 | Mark Sense Card Reader | 1 | 6280-1.pdf | 6280-1.tif |
| 6280-2 | 400 Model 10 | I/O Cable Assembly | 1 | 6280-2.pdf | 6280-2.tif |
| 6282 | C Series | Main Processor | 1 | 6282.pdf | 6282.tif |
| 6283 | C Series | Power Supply and Motherboard | 1 | 6283.pdf | 6283.tif |
| 6338-1 | 400 | Model 85 Keyboard | 1 | 6338-1.pdf | 6338-1.tif |
| 6338-2 | 450,452,462 | Keyboard | 1 | 6338-2.pdf | 6338-2.tif |
| 6339 | 400L | Keyboard | 1 | 6339.pdf | 6339.tif |