OS0

--This may not be accurate--

os0:psp2bootconfig.skprx --> Main Boot Configuration File.
os0:psp2config_dolce --> PSTV Boot Config
os0:psp2config_vita.skprx --> Vita Boot Config
os0:sm/update_service_sm.self --> Handles System Updates
os0:sm/spkg_verifier_sm_w_key_2.self --> Used For Decrypting & Installing .pkg Files
os0:sm/gcauthmgr_sm.self --> Used For Authenticating Gamecarts.
os0:sm/act_sm.self --> used for act.dat related things
os0:sm/utoken_sm.self --> Something to do with uuid's & tokens maybe CID Related.
os0:sm/rmauth.self --> Remove Authentication?
os0:sm/aimgr_sm.self --> ???
os0:sm/compact_sm.self --> Probably something to do with removable media if i had to guess but really its just ??? for me.
os0:sm/qaf_sm.self --> ???
os0:sm/pm_sm.self --> ???
os0:sm/encdec_w_portability --> ???
os0:sm/mgkm_sm.self --> I Suspect "km" stands for kernel module but aside from that no idea
os0:ue/safemode.self --> Safe Mode Menu When You Hold L+R+POWER+PS On Bootup