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The ink ribbon is a long roll the width of the print area positioned between the print chain and the paper. The roll comes in two parts: the feeder roll and take-up roll. The roll is constantly wound and rewound during printing. An IBM 1403, foreground, part of an IBM 7030 Harvest installation at the U.S. National Security Agency
The IBM 4245 is a high-speed impact printer that uses an engraved band. IBM proposed it as a replacement for the 1403, 3203 and the 3211/3811. As an example the Montana Department of Administration bought three 4245s (a model 12 and two model 20s) in October 1985 to replace two IBM 1403s and a 3211/3811. [21] [22] There are four consumable items:
An IBM 1403 printer opened up as it would be to change paper. Note the form tractors on each side of the paper, and the carriage control tape in upper right. The print chain is covered by a full-width ink ribbon, see lower right: The hinged chain-and-ribbon assembly is here swung open towards the camera like a gate. Green-zebra-paper
Since the rise of the personal computer in the 1980s, IBM and other vendors have created PC-based IBM mainframe-compatible systems which are compatible with the larger IBM mainframe computers. For a period of time PC-based mainframe-compatible systems had a lower price and did not require as much electricity or floor space.
Early mainframe printers were usually line printers. Line printers provide a limited set of commands to control how the paper is advanced when print lines are printed. The application writing reports, list, etc. to be printed has to include those commands in the print data. These single character print commands are called printer control characters
A typical configuration might consist of a S/360 model 30 with 32KB memory and the decimal instruction set, an IBM 2540 card reader/card punch, an IBM 1403 printer, two or three IBM 2311 disks, two IBM 2415 magnetic tape drives, and the 1052-7 console.
The computers were offered to replace tabulating machines like the IBM 407. The 1400-series machines stored information in magnetic cores as variable-length character strings separated on the left by a special bit, called a "wordmark," and on the right by a "record mark." Arithmetic was performed digit-by-digit.
Products, services, and subsidiaries have been offered from International Business Machines (IBM) Corporation and its predecessor corporations since the 1890s. [1] This list comprises those offerings and is eclectic; it includes, for example, the AN/FSQ-7, which was not a product in the sense of offered for sale, but was a product in the sense of manufactured—produced by the labor of IBM.
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