What does PLSS stand for?

Paolina and Sons Trucking - Common carrier symbol

Payload Support Structure - NASA (SSD)

Personal Life Support System (SAUS)

Portable Life Support - Astronomy term

Portable Life Support Subsystem (SAUS)

Portable Life Support System - or Subsystem - NASA

Post-Landing Survival System - NASA

Pottable Life-Support System (SAUS)

Precision Location Strike System - Air Force

Prelaunch Status Simulator

Primary Life Support Subsystem (SAUS)

Primary Life Support System - or Subsystem (NASA)

Public Land Survey System (ADWA)

Public Library Systems Section - Public Library Association