awk computerbooks:languages computerbooks:operatingsystems computers computertechnology general linux(computeroperatingsystem) macintosh(computer) macos(computeroperatingsystem) microsoftwindowsnt(computerprogram) non-classifiable nonfiction operatingsystems operatingsystems(computers) sed(computerfile) technology tools unix unix(computerfile) unix(operatingsystem) unix(systèmed'exploitationdesordinateurs) unixlinux unixshells(computerprograms) unixtcl/tk utilitaires(logiciels) utilities utilities(computerprograms)