No, a PSP - they also have consumer, game testing, and movie disc testing models
On
PS3, there are 3 types of NPDRM (plus the fundamentally different security used on disc titles) - type 1 "network" which is verified server side (probably for Plus titles but I've never seen one), type 2 "local" which works offline, using a rif file (license encrypted to your act.dat) + act.dat (system activation), and type 3 "free" which uses a system default key so no external license is required
The PSP is different but free titles (demos, sensme channels, ...) are npdrm-free (ie PS3 type 3, not that they lack protection) and commercial titles are equivalent to PS3 type 2 (you have a rif in /PSP/LICENSE/ iirc and act.dat in flash2)
However with current knowledge the encryption can be brute forced quickly, even on PSP - there are
dedicated plugins for PSP software and
another for commercial PS1 titles (which use a slightly different system, based on a not-exactly-rap-equivalent "keys.bin")