| Yet Another PSP Documentation | PSP Technical Documentation | |
| PSP Firmware | Syscalls | list and comparison of NID to syscall mappings on different Firmwares |
| PSP Firmware | Hardware Access | Hardware Addresses extracted from the PRXes. might be useful for ppl interested in raw hardware access. |
| Memorystick | Info | some Memorystick Developer Info saved from memorystick.org when it was still free to register |
| UMD ECMA | Specifications | Universal Media Disc (UMD) Specs |
| R4400 | Manual | similar to the Allegrex CPU contained in the PSP |
| NEC VR5432 | Manual | contains Info on the Debug Registers which are appearently also present in the Allegrex Core |
| Samsung | Memory Product Codes Memory Storage Product Selection Guide | |
| WM8750 | Datasheet | a similar audio codec is used in the PSP |
| Libertas 88W8000G/88W8510 | Overview | similar to the WLAN component in the PSP |
| Sony CXR704060 | Datasheet english japanese | related ? |
| K9F5608U0B | Datasheet | 32M x 8 Bit NAND Flash Memory, similar to the Flash in the MCP used in the PSP |
| K4X56163PE-L(F)G | Datasheet | 16M x16 Mobile DDR SDRAM, similar to the DDR-SDRAM in the MCP used in the PSP |