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|discontinued=1972 | |discontinued=1972 | ||
|summary=90 MHz non-storage mainframe | |summary=90 MHz non-storage mainframe | ||
|designers=Phil Crosby | |designers=Phil Crosby;Hans Springer | ||
|manuals= | |manuals= | ||
* [[Media:070-1039-00.pdf|7503 Instruction Manual]] (PDF, complete, with schematics, OCR, 38M) | * [[Media:070-1039-00.pdf|7503 Instruction Manual]] (PDF, complete, with schematics, OCR, 38M) |