What does Perk stand for?

Perkins on Conveyancing - A publication (DLA)

Perkins on Pleading - A publication (DLA)

Perkins' Profitable Book (Conveyancing) - A publication (DLA)

Payroll Earnings Record Keeping

Perchloreth(yl)ene (ODA)

Percolate (GOBB)

Perkins Engines - NCIC boat manufacturer code (NCIC)

Perquisite

Prospective Evaluation of Radial Keratotomy - Protocol - Ophthalmology (DAVI)