Search alternatives:
"operation systems computers / http://id.loc.gov/authorities/subjects/sh85094982" » "operations systems computers / http://id.loc.gov/authorities/subjects/sh85094982", "operation system computers / http://id.loc.gov/authorities/subjects/sh85094982", "operational systems computers / http://id.loc.gov/authorities/subjects/sh85094982"
"operation systems computers / http://id.loc.gov/authorities/subjects/sh85094982" » "operations systems computers / http://id.loc.gov/authorities/subjects/sh85094982", "operation system computers / http://id.loc.gov/authorities/subjects/sh85094982", "operational systems computers / http://id.loc.gov/authorities/subjects/sh85094982"