What does .PNM stand for?

.PNM stands for "image/x-portable-anymap"

How to abbreviate "image/x-portable-anymap"?

"image/x-portable-anymap" can be abbreviated as .PNM

What is the meaning of .PNM abbreviation?

The meaning of .PNM abbreviation is "image/x-portable-anymap"

What does .PNM mean?

.PNM as abbreviation means "image/x-portable-anymap"