OT: PSP, XP, TDD and other methodologies for solitary programmers

[Roy Smith]

I know what XP is, but what are PSP, SEI, TDD, and SAPDB?

I tried Google, but it wasn't much help.  I assume the PSP you're
referring to isn't Paint Shop Pro, Progressive Supranuclear Palsy, or
the Pennsylvanie State Police.