PSPvault's Liam McNulty put together a handy, but brief guide to the various flavors of the PSP operating system that Sony updates every time hackers exploit one of the system's software flaws in order to run their own custom programs on the device.
As many readers are fond of reminding us, the PSP really shines once it has been extended with various unofficial software applications.
A portion of Liam's guide is shown in the thumbnail above, but click through for the full thing. It's good stuff!
Check it out at PSPvault (one of wraggsters fave sites )