1858 NTERNATIONAL STANDARD (ISO Information processing - General purpose hubs and reels, with 76 mm (3 in) centrehole, for magnetic tape used in interchange instrumentation applications Traitement de I'information -- Noyaux et bobines a usage general, avec alesage de 76 mm (3 in), pour les bandes magnetiques utilisees dans I'enregistrement de mesures First edition - 1977-02-15 1SO 1858-1977 (E) UDC 681.327.64 Ref. No. ISO 1858-1977 (E) Desc ,instrumentationrecording,bobbinhubs,bobbins,dimensions. Price based on 3 pages FOREWORD iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (iso member bodies). The work of developing International Standards is carried out through IsO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the iso Council. Internationai Standard ISO 1858 was developed by Technical Committee ISO/Tc 97, Computers and information processing, and was circuiated to the memberbodies in October1975. It has been approved by the member bodies of the following countries : Beigium Italy South Africa, Rep. of Brazil Japan Switzerland Czechoslovakia Korea, Rep. of Turkey France Mexico United Kingdom Germany New Zealand U.S.S.R. Hungary Romania Yugoslavia No member body expressed disapproval of the document. This International Standard cancels and repiaces ISO Recommendation R1858-1971,ofwhich itconstitutesatechnical revision @ Intarnational Organization for Standardization, 1977 Printed in Switzerland Sub-committee ISO/TC97/SC12 is concerned withthepreparation of International Standards in the field of magnetic tape for instrumentation applications. The programme of work envisages an inter-related series of International Standards concerning 1) reels, Il) unrecorded magnetic tape, Ill) recorded magnetic tape and IV) recording methods. This International Standard forms part of that series and should be read accordingly. STANDARDSPUBLISHEDANDIN PREPARATION instrumentation applications-Generaldimensional requirements. IsO1860,Information processing g-Precision reels for magnetic tape for interchange instrumentation applications. Is0 2690, Unrecorded magnetic tapes for instrumentation applications -F Physical propertiesandtestmethods. iso 3413, Information processing - Recorded magnetic tapes for interchange Iso 3615, Magnetic tape for instrumentation applications - Standardization of analogue modes of recording. Iso.. ., Interchange practices and test methods for unrecorded instrumentation magnetictape Iso . . , Interchange practices and test methods for recorded magnetic tape. ili