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Glossary
Index
Glossary
The following terms are defined as they are used in printer documentation.
If you do not find the term you need, refer to the index or to the IBM Dictionary of Computing, SC20-1699.
The following cross-references are used in this glossary:
- Contrast with. This refers to a term that has an opposed or substantively
different meaning.
- Synonym for. This indicates that the term has the same meaning as another
term, which is defined.
- Synonymous with. This identifies terms that are synonyms for the term
that is defined.
- See. This refers to multiple-word terms that have the same last word.
- See also. This refers to related terms that have a similar, but not synonymous,
meaning.
A
- ABIC
- See Adaptive Bi-Level Image Compression.
- ac
- Alternating current.
- adaptive bi-level image compression (ABIC)
- A 4-bit image capable of displaying up to 16 shades of gray.
- adhesive label
- Special-application material; typically consists of paper labels coated
on one side with an adhesive mixture temporarily affixed to backing material.
See also carrier.
- Advanced Function Common Control Unit (AFFCU)
- An IBM RISC-based control unit with code common to all printers that
use AFFCU.
- Advanced Function Image and Graphics
- A integral facility within the printer to directly process IOCA image
and GOCA graphics data streams.
- AEA
- Alternate Exception Action.
- AFCCU
- See Advanced Function Common Control Unit.
- AFIG
- Advanced Function Image and Graphics.
- AFP
- Advanced Function Printing or Advanced Function Presentation.
- AFPF
- Advanced Function Print Finishing.
- AF Post
- Advanced Function Postprocessing.
- all-points addressability
- The capability to address, reference, and position text, overlays, and
images at any defined point on the printable area of a page.
- ANSI
- American National Standards Institute.
- APA
- All-Points Addressable.
- application
- The use to which an information processing system is put; for example,
a payroll application, an airline reservation application, a network application.
- application program
- A program written for or by a user that applies to the user's work,
such as a program that does inventory control or payroll.
- application programmer
- A person who develops application programs. Contrast with system programmer.
- ARQ
- Active Record Queue.
- ASHRAE
- American Society of Heating, Refrigeration, and Air Conditioning Engineers.
B
- bar code
- A code representing characters by sets of parallel bars of varying thickness
and separation that are read optically by transverse scanning.
- basis weight
- The weight in pounds of a ream (500 sheets) of paper cut to a given
standard size for that grade; for example, 25 x 38 inches for book papers,
17 x 22 inches for bond papers, and other sizes for other grades. The basis
weight of continuous forms for computer output is based on the size for bond
papers.
- BCOCA
- Bar Code Object Content Architecture. See also bar
code.
- binder holes
- A series of holes or slots punched at set intervals that allows the
form to be inserted in a loose-leaf or ring binder.
- bond (paper)
- Paper formulated with at least 80% wood pulp. Bond-paper forms work
best in the printer.
C
- calender
- A process to make paper smooth or glossy by passing it through a series
of metal rollers during the last steps of a paper-making machine.
- calender cut
- Slits, glazed lines, or discolored lines across the paper caused when
wrinkles pass through the calender rollers.
- caliper
- The thickness of forms. This is usually expressed in thousandths of
an inch.
- carrier
- The backing material for labels. Labels consist of the printable material,
the adhesive, and the carrier.
- CCW
- Channel Command Word.
- CE
- Customer Engineer (IBM).
- CGPC
- Canadian Grocery Product Code.
- chad
- (1) The material separated from a data medium when punching a hole.
- (2) The residue separated from the carrier holes in continuous forms.
- change
- As used in printer action messages, instructs the printer operator to
remove and discard a used component and then install a new one. For example,
the CHANGE TONER COLLECTOR message indicates that the operator
should take out the toner-collector bottle, throw it away, and put in a new
one.
- channel command
- An instruction directing a data channel, control unit, or device to
perform an operation or set of operations.
- character
- A letter, number, punctuation mark, or special graphic used for the
production of text.
- character set
- (1) A finite set of different characters that is complete for a given purpose;
for example, the character set in ISO Standard 646, "7-bit Coded Character
Set of Information Processing Interchange."
- (2) A group of characters used for a specific reason; for example, the set
of characters a printer can print.
- check
- As used in printer action messages, instructs the printer operator to
inspect a component. For example, the CHECK TONER COLLECTOR message
indicates that the operator should look at the toner-collector bottle and
ensure that it is physically present, in the proper place, and correctly installed.
- clear
- As used in printer action messages, instructs the printer operator to
remove jammed forms, paper scraps, and other debris from the printer. For
example, the CLEAR UPPER TRACTOR message indicates that forms are
wedged in the transfer station area, and the operator must remove them before
the printer can operate.
- coated paper
- Paper that has had a surface coating applied to produce smoothness.
- Code Page Global Identifier (CPGID)
- A unique code page identifier that can be expressed as either a two-byte
binary or a five-digit decimal value.
- configuration
- (1) The arrangement of a computer system or network as defined by the nature,
the number, and the chief characteristics of its functional units. More specifically,
the term configuration may refer to a hardware configuration or a software
configuration.
- (2) The devices and programs that make up a system, subsystem, or network.
- configure
- The procedure used to customize the printer to a specific operating
and communication environment.
- connector
- A means of establishing electrical flow.
- constant data
- Data that does not change; for example, the company letterhead and standard
text in form letters, or the headings and boxes on a preprinted form. Contrast
with variable data.
- continuous forms
- A series of connected forms that feed continuously through a printing
device. The connection between the forms can be perforated to allow the user
to tear them apart or can be nonperforated for use with a burster/trimmer/stacker.
- controlled-access area
- An area where access is limited to authorized personnel.
- controlling computer
- The processing unit to which the printer is attached through a channel
interface.
- controlling computer system
- The data-processing system to which a network is connected and with
which the system can communicate.
- corner cut
- In a form, a cut or opening of any size containing one or more right
angles.
- corona
- A small diameter wire (or wires, depending on the function) to which
a high voltage is applied, causing ionization of the air. The ionization creates
an electrical charge to perform various functions during the printing process.
- CPGID
- See Code Page Global Identifier.
- CSW
- Channel Status Word.
- cure
- The process of drying ink sufficiently for minimum transfer of the ink
to any parts of the printer it contacts.
- cut
- The severed part of a perforation. Cuts are separated by ties. See also perforation.
- cutout
- A part of the form that has been eliminated or perforated for subsequent
removal; for example, corner cuts and binder holes.
D
- DASD
- Direct Access Storage Device.
- data streaming
- A non-interlocked method of data transfer used by the printer channel
to decrease data transfer time during write operations.
- DBCS
- Double Byte Character Set.
- DCF
- See Document Composition Facility.
- developed image
- The image that has been exposed onto the photoconductor and covered
with toner by the developer.
- developer mix
- A combination of carrier beads and toner in which the beads electrically
charge the toner.
- diagnostic
- Pertaining to the detection and isolation of errors in programs and
faults in equipment.
- diagnostic mode
- The operational mode in which the printer can check itself in case of
a malfunction. When the printer is in diagnostic mode, it is not accepting
information from the attached controlling computer system. In the printer,
only service representatives can use diagnostic mode. Contrast with print mode and test mode.
- direct attach
- The environment in which an application program directly allocates the Infoprint 3000
Printing Subsystem.
- dishing
- The curve a stack of forms takes when folded or refolded at the fold
perforation.
- diskette
- A thin, flexible, magnetic disk enclosed in a protective jacket.
- Document Composition Facility (DCF)
- An IBM licensed program that provides text formatting for the printer.
- down fold
- Fanfold forms are alternately folded. When fanfold forms are unfolded
and held horizontally, a fold is a down fold if it points down from the horizontal
surface.
- DPE
- Decompression Performance Enhancement.
- DPI
- Dots per inch.
- drag
- The resistance to forms feeding freely into the printer; for example,
the form rubbing against the carton.
- duplex printing
- A mode of printing on both sides of a form. Contrast with simplex printing.
E
- EAN
- European Article Numbers.
- EBCDIC
- Extended Binary-Coded Decimal Interchange Code.
- EC
- Engineering Change.
- electronic overlay
- A collection of constant data electronically composed in the controlling
computer. Can be merged with variable data on a page during printing. An electronic
overlay defines its own environment. It can be in coded form or raster pattern
form. See also preprinted form.
- electrophotographic process
- The creation of an image on forms by uniformly charging the photoconductor,
creating an electrostatic image on the photoconductor, attracting negatively
charged toner to the discharged areas of the photoconductor, and transferring
and fusing the toner to forms.
- emboss
- To press and raise the surface of paper into a design. Embossed paper
appears thicker than non-embossed paper, can increase printer wear, and can
degrade print quality.
- end-of-forms sensor
- A sensor that detects when the last sheet of a form enters the printer.
- error log
- (1) A data set or file in a product or system where error information is
stored for later access.
- (2) A record of machine checks, device errors, and volume statistical data.
- ESCON
- Enterprise System Connection.
- ESCON channel
- A channel having an Enterprise Systems Connection channel-to-control
unit I/O interface that uses serial-by-bit optical cable as a transmission
medium.
- ESMM
- End Select Medium Modification.
- Ethernet
- A local area network that allows attachments to transmit on the network
without prior coordination.
- exchange
- As used in the Infoprint 3000 action messages, instructs the printer operator
to remove a component and install a new one. For example, the EXCHANGE
MAIN CHARGER message indicates that the operator should take out the
main charger and put in a new one.
F
- fanfold
- Continuous forms that are alternately folded at regular intervals, usually
on a perforation.
- FDDI
- See Fiber Distributed Data Interface.
- FGID
- See Font Typeface Global Identifier.
- Fiber Distributed Data Interface (FDDI)
- An ANSI standard for a 100 Mbps LAN using optical fiber cables.
- FLSF
- See Font Library Service Facility.
- FOCA
- Font Object Content Architecture.
- fold memory
- The ability of a form to refold at the fold perforation after exposure
to heat during the fusing process.
- fold perforation
- The perforation on which a form is folded during manufacture and refolded
after printing. See also page perforation.
- Font Library Service Facility (FLSF)
- A licensed program that provides a way to make changes to a font while
retaining its correct format, as defined by the architecture and as required
by Print Services Facility.
- Font Typeface Global Identifier (FGID)
- A unique font identifier that can be expressed as either a two-byte
binary or a five-digit decimal value. The FGID is used to identify a type
style and the following characteristics: posture, weight, and width.
- format
- (1) The arrangement or layout of data on a data medium.
- (2) The size, style, type of page, margins, printing requirements, and so
on, of a printed page.
- FORMDEF
- See form definition.
- forms
- The material on which output data is printed, such as paper or adhesive
labels. The area between perforations on continuous printer forms. See electronic overlay and preprinted form.
- forms path
- The entire route that forms travel during processing. The forms path
usually begins where the forms are loaded and ends at the stacker. Synonym
for paper path.
- form definition (FORMDEF)
- A statement that specifies the attributes of a physical page, such as
the number of copies and one-sided or two-sided printing.
- fuse
- In the printer, to use heat and pressure to blend toner onto forms to
make a permanent bond.
G
- GCSGID
- See Graphic Character Set Global Identifier.
- GDDM
- See Graphical Data Display Manager.
- GOCA
- Graphics Object Content Architecture.
- graphic
- A symbol produced by a process such as handwriting, drawing, or printing.
See also vector graphics.
- Graphic Character Set Global Identifier (GCSGID)
- A unique graphic character set identifier that can be expressed as either
a two-byte binary or a five-digit decimal value.
- Graphical Data Display Manager (GDDM)
- An IBM licensed program that allows pictures to be defined and displayed
through function routines.
I
- IBM branch office
- The local IBM sales office.
- IBM installation planning representative
- An IBM representative who assists customers in planning and meeting
the requirements for installing hardware.
- IBM marketing representative
- An IBM representative who takes your order.
- IBM MMR
- Similar to MMR 2-dimensional image compression algorithm. See also MMR and MR.
- IBM service representative
- An IBM representative who services IBM products in the field.
- IBM World Trade Corporation
- A subsidiary of IBM that manufactures and markets IBM products outside
of the United States of America.
- IEEE
- Institute of Electrical and Electronics Engineers.
- IHF
- Image Handling Facility.
- impact printer
- A printer in which printing is the result of mechanical impacts. Contrast
with nonimpact printer.
- IML
- Initial Microcode Load.
- installation
- (1) In system development, preparing and placing a functional unit in position
for use.
- (2) A particular computing system, including the work it does and the people
who manage it, operate it, apply it to problems, service it, and use the results
it produces.
- installation verification procedure
- A procedure distributed with IBM licensed programs that tests the newly
installed IBM programs to verify that the basic facilities of the programs
are functioning correctly.
- Intelligent Printer Data Stream (IPDS)
- Information the system sends to printers that contains decision-making
capability. Generally, this information contains basic formatting, error recovery,
and character data.
- IOCA
- Image Object Content Architecture.
- IPDS
- See Intelligent Printer Data Stream.
- IPM
- Impressions per minute.
- ISO
- International Organization for Standardization.
- ISO sizes
- Pertaining to a set of paper sizes selected from those standardized
by the International Organization for Standardization (ISO) for use in data
processing.
J
- jam
- In a printer, a condition where forms have become blocked or wedged
in the forms path so the printer cannot operate.
- JAN
- Japanese Article Numbers.
- JES2
- 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 an installation with more than one processor, each
JES2 processor independently controls its job input, scheduling, and output
processing. See also JES3.
- 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. See also JES2.
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. Contrast with portrait orientation.
- laser (light amplification 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 an IBM printer.
- library
- A collection of related files. For example, one line of an invoice may
form an item, a complete invoice may form a file, and the collection of inventory
control files 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
- (1) The boundary for determining the limits of printing.
- (2) A presentation space in which the page data is presented.
- (3) A collection of data that can be printed on a sheet of paper or other
type of form. Contrast with physical page.
- 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 printer, refers to the microprogramming stored on the control
unit hard disk. 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-Interrupt Handler.
- MMR
- Modified-Modified READ; 2-dimensional image compression algorithm. Also
referred to as TSS Group 4.
- MPC
- See Multiple Printer Controller.
- MR
- Modified READ. See READ. 2-dimensional image
compression algorithm. Also referred to as TSS Group 3.
- Multiple Printer Controller (MPC)
- Controller used with Infoprint 3000 for on-demand printing. Sometimes referred
to as a Print On Demand (POD) server.
- 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.
- MVS/SP
- See Multiple Virtual Storage/System Product.
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.
- NPRO
- See nonprocess runout.
O
- OCR
- See Optical Character Recognition.
- offset paper
- In printing, a grade of paper to which sizing is added to resist moisture
and which is treated on the surface to prevent lifting of the paper during
printing by ink presses.
- OGL
- See 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 satisfied before an IBM printer 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 orientation of an overlay relative to the page point of origin.
See also text orientation.
- OS/VS
- See Operating System/Virtual Storage.
- overlay
- See electronic overlay.
- Overlay Generation Language/370 (OGL/370)
- The licensed program that is used to create electronic overlays.
P
- page
- An object that contains presentation data. See also logical page and physical page.
- page definition (PAGEDEF)
- A statement that specifies attributes of a logical page, such as the
width of its margins and the orientation of text.
- page perforation
- The perforation that defines the page of a form. It may or may not be
at a fold in the form. A form may have several pages between each fold. See
also fold perforation.
- page printer
- A device that prints one page as a unit. Contrast with line printer.
- Page Printer Formatting Aid/370 (PPFA/370)
- A licensed program that creates form definitions (FORMDEFs) and page
definitions (PAGEDEFs).
- pallet
- A portable platform for handling, storing, or moving materials.
- paper break
- A separation, either at a perforation or from a tear, of the continuous-forms
paper.
- paper path
- The entire route that forms travel while they are being processed. The
paper path usually begins where the forms are loaded and ends at the stacker.
Because not all forms are paper, the term forms path
is preferred.
- parallel channel
- A channel having a System/360 or System/370 channel-to-control unit interface
that uses parallel cable bus-and-tag as a transmission medium. Contrast with ESCON channel.
- parameter
- A variable that is given a constant value for a specified application
and that may denote the application.
- partition
- In Basic N_Up printing, the division of the medium presentation space
into a specified number of equal-sized areas in manner determined by the current
physical medium.
- PC
- Photoconductor.
- PC drum
- A hollow cylinder that is covered with photoconductive material.
- pel (picture element)
- (1) An element of a raster pattern; a point where a toned area on the photoconductor
may appear.
- (2) On an all-points-addressable output medium, each pel is an addressable
unit. On a row-column addressable output medium, the only pel addressable
is the beginning of a character cell.
- PEM
- Print-Error Marker.
- perforation
- A linear series of unconnected cuts in the continuous-forms paper. The
interval between cuts is referred to as a tie. The perforation defines either
a fold or page boundary. See also cut, fold perforation, microperforation, and page perforation.
- photoconductor
- The material that is wrapped about the drum. The medium for transferring
images to paper.
- physical page
- The form on which the printer is printing, such as an 11 x 8.5-in.
sheet of paper. Contrast with logical page.
- physical planner
- The person in an organization who plans the environmental, electrical,
and space requirements for your facility.
- pixel
- See pel.
- planning coordinator
- The person in your organization who is responsible for coordinating
all the planning and installation activities for the printer.
- plant
- A manufacturing location.
- PMF
- See Print Management Facility.
- POD
- Print On Demand.
- point of origin
- The location of the first print position on a logical page. The point
of origin is usually stated in terms of X and Y coordinates. The point of
origin used by a printer can be affected by factors such as printable area
and forms orientation. See also logical page.
- portrait orientation
- Pertaining to a display or hard copy with greater height than width.
Contrast with landscape orientation.
- PPFA
- Page Printer Formatting Aid.
- PQE
- Print Quality Enhancement.
- preprinted form
- A sheet of forms containing a preprinted design of constant data with
which variable data can be combined. See also electronic
overlay.
- Print Management Facility (PMF)
- An interactive menu-driven program that can be used to create and modify
fonts and to define output formatting for data printed on the printer.
- print mode
- The operational mode in which information is received from the attached
controlling computer system and printed output is produced. Contrast with diagnostic mode and test mode.
- print position
- The physical positions of the characters constituting a print line relative
to the form.
- print quality
- The quality of printed output relative to existing standards and in
comparison with jobs printed earlier.
- Print Services Access Facility (PSAF)
- A menu-driven, print-parameter selection program for page printers controlled
by PSF.
- print surface
- The side of a form that receives the printed image.
- PSAF
- See Print Services Access Facility.
- PSF
- Print Services Facility.
- PUM
- Printer Utility Module.
R
- RAM
- Random Access Memory.
- RAS
- Reliability, availability, and serviceability.
- raster
- (1) In computer graphics, a predetermined pattern of lines that provides
uniform coverage of a display space.
- (2) The coordinate grid that divides the display area of a display device.
- (3) In the Printer Subsystem, an on/off pattern of electrostatic
images produced by the laser print head under control of the character generator.
- raster pattern
- A series of picture elements (pels) arranged in scan lines to form an
image.
- READ
- Relative Element Address Designate.
- registration
- In printing, refers to the relative print positions of images that are
printed at different times. For example, when you process preprinted forms,
the registration is good if the new image printed by the printer aligns correctly
with the preprinted image. Print that extends beyond box edges and text that
overlaps other text are examples of poor registration.
- resource
- (1) People, equipment, or material used to perform a task or a project.
- (2) Any facility of a computing system or operating system required by a
job or task, including main storage, input/output devices, processing units,
data sets, and controller processing programs; for example, page printers
use resources such as form definitions, page definitions, and fonts.
- reverse heading
- A heading where each character is highlighted by reversing the color
of the character with its background; for example, changing a black character
on a white background to a white character on a black background.
- RPQ
- Request for Price Quotation.
S
- SBCS
- Single Byte Character Set.
- scanner
- A device that examines OCR, graphics, MICR, or bar-code patterns and
generates electrical signals corresponding to the pattern. It sends the signals
to a computing device for processing.
- screen or screening
- In document printing, a sheet of material, usually film, carrying a
regular pattern of small dots. When printing, ink adheres only to the dots,
and many dots close together appear solid. This method prints large areas
of ink on paper but uses much less ink than printing the same area with solid
ink.
- SCSW
- Subchannel Status Word.
- SDLC
- See Synchronous Data Link Control.
- security paper
- Specially formulated paper used for negotiable documents, such as checks,
which improves the anti-fraud characteristics of the document.
- shift
- A scheduled work period. For example, a 24-hour day is often divided
into three 8-hour shifts.
- simplex printing
- Pertaining to printing on only one side of a form. Contrast with duplex printing.
- sizing
- A process where paper is treated to give it resistance against penetration
of liquids.
- SMM
- Select Medium Modification.
- SNA
- System Network Architecture.
- special-purpose materials
- Printable items other than blank forms; for example, adhesive labels
and preprinted forms.
- SRC
- See system reference code.
- stack lean
- A measurable slope from the vertical of a stack of forms. Excessive
stack lean can cause failures when feeding and refolding forms.
- Synchronous Data Link Control (SDLC)
- For managing synchronous, code=transparent, serial=by=bit, information
transfer over a link connection.
- system reference code
- A code that contains information, such as a failing field-replaceable
unit, for a customer engineer.
- system programmer
- A programmer who plans, generates, maintains, extends, and controls
the use of an operating system, with the aim of improving overall productivity
of an installation. Contrast with application programmer.
- System/370
- An upward-compatible extension of the IBM System/360. A large collection
of computing system devices that can be combined to produce a wide range of
computing systems that share many characteristics, including a common machine
language.
T
- task
- A basic unit of work to be accomplished by a device or an operator.
- TCP/IP
- Transmission Control Protocol/Internet Protocol. A set of communication
protocols that support peer-to-peer connectivity functions for both local
and wide area networks.
- TCS
- See Two-Channel Switch.
- tensile strength
- A measure of the force that the paper forms can withstand without tearing.
- test mode
- The operational mode in which the printer can produce print samples,
accept configuration changes, and control traces. When the printer is in test
mode, it is not accepting information from the attached controlling computer
system. Contrast with diagnostic mode and print mode.
- text orientation
- The position of text as a combination of print direction and baseline
direction.
- token
- In a local area network (LAN), a particular message or bit pattern that
is passed successively from one attaching device to another to indicate which
attachment has permission to transmit.
- token ring
- A network with a ring topology that passes tokens from one attaching
device to another.
- tie
- The interval between cuts of a perforation. See also perforation.
- toner
- The material that forms the image on the paper.
- trace
- (1) A record of the running of a computer program. It exhibits the sequences
in which the instructions were executed.
- (2) To record a series of events as they occur.
- (3) In the printer, a service representative and customer analysis procedure.
- tractor
- The mechanism that controls movement of continuous forms by way of holes
(see tractor holes).
- tractor holes
- The holes in the side margins on continuous forms. When placed on the
tractor pins, the holes maintain printer alignment and registration, and control
the movement of the paper.
- TSS
- Telecommunication Standardization Sector.
- Two-Channel Switch
- A device used with the System/370 channel attachment, that allows an input
or output device to be attached to two channels.
U
- up fold
- Fanfold forms are alternately folded. When fanfold forms are unfolded
and held horizontally, a fold is an up fold if it points up from the horizontal
surface.
- UPC
- Universal Product Code.
V
- variable data
- The data that can vary; for example, the names and addresses in form
letters.
- vector graphics
- Computer graphics in which display images are generated from display
commands and coordinate data. Contrast with raster pattern.
- Virtual Storage Extended (VSE)
- An operating system that is an extension of Disk Operating System/Virtual
Storage.
- Virtual Storage Extended/Advanced Functions (VSE/AF)
- The minimum operating system support for a VSE-controlled installation.
- void
- (1) The missing part of a printed character.
- (2) The missing piece of a continuous form.
- VSE
- See Virtual Storage Extended.
- VSE/AF
- See Virtual Storage Extended/Advanced Functions.
- VSE/SP
- Virtual Storage Extended/System Product.