JES3. An MVS subsystem that receives jobs into the system, converts them to internal format, selects them for running, processes their output, and purges them from the system. In complexes that have several loosely coupled processing units, the JES3 program manages processors so that the global processor exercises centralized control over the local processors and distributes jobs to them via a common job queue.

K

KB. Kilobyte (1KB=1 024 bytes).

L

LAN. Local area network.

landscape orientation. Text and images that are printed parallel to the longer side of the forms.

laser (light ampli®cation by stimulated emission of radiation). A device that emits a beam of coherent light.

latent image. In a printer, the invisible image that exists in the sensitized material after exposure but before development.

layout plan. A list of requirements, such as electrical and space, that must be considered before installing the IBM InfoPrint 3000.

library. A collection of related ®les. For example, one line of an invoice may form an item, a complete invoice may form a ®le, and the collection of inventory control ®les may form a library. The libraries used by an organization are known as the data bank.

licensed program. A separately priced program that bears an IBM copyright and is offered to customers under the terms and conditions of the Agreement for IBM Licensed Programs.

line printer. A printer that prints a line of characters as a unit. Contrast with page printer.

logical page. The print on the page, such as composed text, graphics, and fonts within de®ned margins.

logo. An identifying emblem, statement, or motto of a company.

M

MB. Megabyte (1MB=1 048 576 bytes).

MICR. Magnetic ink character recognition.

microcode. In the InfoPrint 3000, refers to the microprogramming stored on the microcode (or EC)

diskette. Microcode is used by the control unit to manage the printer and its functions.

microperforation. Extremely small perforations. After forms are separated, those with microperforations typically have smoother edges than those with regular perforations.

MIH. Missing interruption handler.

MMR. Modi®ed-Modi®ed READ; 2-dimensional image compression algorithm. Also referred to as CCITT Group 4.

MR. Modi®ed READ; (READ=Relative Element Address Designate) 2-dimensional image compression algorithm. Also referred to as CCITT Group 3.

Multiple Virtual Storage/System Product (MVS/SP). Consisting of MVS/System Product Version 1 and the MVS/370 Data Facility Product operating on a System/370 processor.

N

nonimpact printer. A printer in which printing is not the result of mechanical impacts. Contrast with impact printer.

nonprocess runout (NPRO). An operation that moves forms through the forms path without printing.

O

OCR. Optical character recognition.

offset paper. A grade of paper to which sizing is added to resist moisture and surface during printing by ink presses.

OGL. Overlay Generation Language.

operating environment. The physical environment; for example, temperature, humidity, layout, or power requirements.

operating requirements. A list of requirements, such as environmental, electrical, and space, that must be satis®ed before the IBM InfoPrint 3000 can be installed.

Operating System/Virtual Storage (OS/VS). A compatible extension of the IBM System/360 Operating System that supports hardware and the extended control facilities of System/370

optical character recognition (OCR). Character recognition that uses optical means to identify graphic characters.

orientation. The number of degrees an object is rotated relative to a reference; for example, the

Glossary 301

Page 333
Image 333
IBM 3000 manual Glossary