This application is the line command Open the file/folder & Eject the drive
Usage:
OOPEN.EXE [option] [target file or folder]
Usage for eject:
OOPEN.EXE target drive-id
OOPEN.EXE /A
Usage for help:
OOPEN.EXE /?
-> URL: http://www.vector.co.jp/download/file/os2/util/fh484672.html
Source: OS2.org