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Schedule maintenance (Bbjk)

Computer viruses ()
Transportation operations (B)
     Related Term (Associative): Management and organization (C)
    Freight and passenger services (Bb)
        Schedules and scheduling (Bbj)
            Schedules (Bbjf)
            Scheduling (Bbjh)
            Schedule maintenance (Bbjk)
                On time performance (Bbjkm)
                     Related Term (Associative): Flight time (Qdbct)
            Service time (Bbjp)
                 Use For: Maintenance time
            Layover time (Bbjr)
            Dwell time (Bbjs)
            Code sharing (Bbjt)
            Interlining (Bbju)