open-via
open-ware
operability
operable
operand
operandi
operating
operating-time
operation
operation-address
  operational
operational-address
operation-control
operationing
operation-use
operative
operativeness
operator
operator-computer
operator-entered
operator-guide

    operational label

    маркировочная метка, маркировочный знак (для идентификации файла на магнитной ленте)