Abstract: An improved method and cutting blade having two cutting prongs with sharpened cutting tips attached thereto, for accessing optical fibers contained in a buffer tube is provided. When the cutting blade is mounted in an optical fiber access tool, relative movement of the tool with respect to the buffer tube causes the sharpened cutting tips to score the buffer tube so that a section of the buffer tube can be separated from the buffer tube to provide access to the optical fibers contained therein.

Abstract: An industrial control system in accordance with the present invention is provided with a plurality of diverse controlled devices (e.g., fans, pumps, valves, solenoids, relays, etc.) for effecting overall system control. Each device has a unique set of logic control functions and/or command sequences and is connected, through an input/output interface, to a stored-program single board computer that provides device control and monitoring. The computers each include a central processor controlled by a composite or "master" program which is common to all the computers and which includes instruction sequences for all logic control functions and command sequences that exist within the system. A user alterable interconnection device (UAID) permits only those logic control function and/or command sequence portions of the master program that relate to a particular one of the controlled devices to operatively connect with the particular input/output ports associated with that controlled device.