Spectrometer instruments are characterized by classifying their spectra into previously defined clusters. Other systems, computer program products, and methods are described according to more embodiments. The exposed optical fiber is brought into contact with a tangential swipe formed of abrasive film to cause the optical fiber to cleave substantially at the location of contact leaving an optical fiber stub with a cleaved end. The policy enforcement device receives a packet sourced by the subscriber device and destined to the packet data network, applies the policy rule to the packet to associate the packet to the service chain, and forwards the packet according to the service chain. The main engine vibration isolators allow longitudinal rocking of the engine and transmission while minimizing energy transfer to the frame. The slider frame includes a sealing frame extending entirely about the opening, an upper run located above the opening and receiving the slider panel, and a lower run located below the opening and receiving the slider panel.