You can found a technical description of TAPEWATCHER in two preprints: 1) Rel. 1.0: LNGS - 93/54 - MARCH 1993 (User version). Italian. TAPEWATCHER.PS --> Rel. 1.0. Technical description. Postscript file. TAPEWATCHER.C --> Rel. 1.0. C source code file. GET_DCH.COM --> Rel. 1.0. DCL file (network object). 2) Rel. 2.0: LNGS - 93/78 - AUGUST '93 (Clusterwide version). English. TW_CLSTWIDE.PS --> Rel. 2.0. Technical description. Postscript file. TW_CLSTWIDE.C --> Rel. 2.0. C source code file. TX_CLSTWIDE.COM --> Rel. 2.0. DCL file (network object). TW_STARTUP.NCL --> Rel. 2.1. NCL setup file for DECnet Phase-V.