What does PIES stand for?

Packaged Interchangeable Electronic System

Penning Ionization Electron Spectroscopy

Photographic Image Editing System (SAUS)

Pollution Prevention Information Exchange System - Environmental science

Procurement and Inventory of Equipment System (DNAB)

Procurement Information Exchange System (SAUS)

Program Information and Evaluation System (SAUS)

Project Independence Evaluation System - Energy policy

Purchasing Information Exchange System (SAUS)