: You can find all official technical documentation, including product briefs and hardware schematics, at the Raspberry Pi Product Information Portal .
: If you are using Raspbian Lite without a desktop, you can use fbpdf to view PDFs directly in the framebuffer (the "FB" in your filename might refer to this).
The naming convention suggests it might be a specialized document, such as a or a product brief from April 2022 (0422) . How to Download and Use PDF Files on Raspberry Pi
