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Guy Harris (talk | contribs) The Systems Reference Library is probably best thought of as a series of books. Call it the "IBM Systems Reference Library" (not sure whether the "IBM" on the cover page is just "this is from IBM" or is part of that phrase). |
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==Assembler statement format==
[[Image:IBM System 360 Assembler Coding Form.jpg|thumb|right|Some programmers used an assembler coding form for the IBM 360 assembler and its successors]]
[[Image:IBM keypunch deck and program listing for Assembly language student program at New York University 1979.jpg|thumb|right|Keypunch cards and a printed assembly listing were common during IBM 370 assembly language use in the 1970s]]
The format of assembler language statements reflects the layout of an 80-column punched card, though successive versions have relaxed most of the restrictions.
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