mgrtopbm
converts MGR window system bitmap format to PBM
TLDR
Convert MGR bitmap to PBM
$ mgrtopbm [input.mgr] > [output.pbm]
SYNOPSIS
mgrtopbm [file]
DESCRIPTION
mgrtopbm converts MGR window system bitmap format to PBM. MGR was a windowing system developed at Bellcore in the late 1980s. Part of Netpbm toolkit.
INSTALL
sudo apt install netpbm
sudo dnf install netpbm
sudo pacman -S netpbm
sudo apk add netpbm
sudo zypper install netpbm
brew install netpbm
nix profile install nixpkgs#netpbm