: It could be related to a specialized application or industry. For example, in the field of electronics, .bin files are often used for firmware.
In emulation, a .bin file contains the "raw" binary data dumped from a physical chip on the original arcade board. sp5001.bin
: In some contexts, files with this naming convention were part of SSD (Solid State Disk) images containing early 90s software or games for Psion devices. Decoding sp5001