Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym PLSS is...

PLSS is

Primary Life Support Subsystem
Portable Life Support System
Portable Life Support Subsystem

More Meanings For PLSS:

Primary Life Support System
Precision Location Strike System
Primary Life Support Subsystem
Portable Life Support System
Portable Life Support Subsystem

PLSS is also in:

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