What does $O1 stand for?

$O1 stands for "Pipe file (DOS)"

How to abbreviate "Pipe file (DOS)"?

"Pipe file (DOS)" can be abbreviated as $O1

What is the meaning of $O1 abbreviation?

The meaning of $O1 abbreviation is "Pipe file (DOS)"

What does $O1 mean?

$O1 as abbreviation means "Pipe file (DOS)"