What does .PGM stand for?

.PGM stands for "image/x-portable-graymap"

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

"image/x-portable-graymap" can be abbreviated as .PGM

What is the meaning of .PGM abbreviation?

The meaning of .PGM abbreviation is "image/x-portable-graymap"

What does .PGM mean?

.PGM as abbreviation means "image/x-portable-graymap"