Information technology. Data interchange on 12,7 mm, 48-track magnetic tape cartridges. DLT 1 format|Endurance testing, Digital recording methods, Magnetic measurement, Cassettes (magnetic tapes), Electrical testing, Electrical resistance, Adhesion, Error-correction codes, Form tolerances, Frequency modulation, Recording characteristics, Performance, Recording tracks, Magnetic tapes, Transportation, Rigidity, Moment of inertia, Data media, Data processing, Data blocks, Information exchange, Modulus of elasticity, Environment (working), Drums (materials handling equipment), Tensile strength, Dimensions, Wear tests, Roughness (surface), Position, Optical measurement, Transmittance, Coatings, Magnetic recording, Error detection, Materials handling, Conformity, Peeling tests, Calibration, Numerical designations, Cupping tests, Interchangeability, Abrasion, Test equipment, Circuits, Friction tests, Data layout, Data recording, Adhesion tests