1-10

From O to P

OAG
Open Applications Group. A non-profit, vendor-focused consortium formed by leading enterprise software vendors. Their purpose is to create more open application inte re that automates the direct business functions occurring in an enterprise.

OCR
Optical character recognition. The machine identification of printed characters through use of light-sensitive devices.

OCR-A
The character set contained in ANSI Standard X3.17-1981. A stylized font for traditional OCR printing.

OCR-B
The character set contained in ANSI Standard X3.49-1975. A stylized font for traditional OCR printing.

OCR font
A font that is recognized by optical character recognition.

ODBC
Open database connectivity. Microsoft's strategy for open database interface. Part of the Windows Open Services Architecture (WOSA), ODBC makes it possible to access both relational and non-relational database management systems (DBMS) in a heterogeneous PC environment with minicomputers linked to a mainframe. Defined by the SQL Group, a standards group made up of database vendors.

offline
The state in which the printer is not able to carry out two-way communication with the host.

OLE
Object linking and embedding. A technology that allows object-based components to be transferred between various machines and applications.

One-Shot mode
A scanner mode that requires you to activate the scanner each time you want to scan a bar code. Once you scan a bar code, the scanner turns off.

online
1. The state in which the printer is able to carry out two-way communication with the host. 2. An operation in which peripheral devices are connected directly to the processing unit.

opacity
The optical property of a substrate material that quantifies the show-through from the back side or the next sheet. The ratio of the reflectance with a black backing to the reflectance with a white backing. Ink opacity is the property of an ink that prevents the substrate from showing through.

open circuit
To keep two or more parts electrically separate or disconnected. See also short circuit.

operating environment
Generally connotes hardware and software combined; differs from an operating system, which refers to software only.

operating system
Refers to the code that operates a computer by managing its file systems, handling user input and output, and running programs. DOS, Windows, and UNIX are all operating systems.

operator information area
OIA. A line on a 3270 or 5250 emulator screen that contains status information (for example, input inhibited, keylock, system available) for a terminal session.

operator software
A software package that accompanies the 7350 and can be used by the operator to view scanned images or decoded information and configure some of the parameters of the 7350.

optical head
Part of the 7350 Wide Area Bar Code Scanner. The optical head is mounted over the conveyor belt and contains the camera and lights.

optical serial port
The reader's COM1 is an optical serial port. You can communicate through COM1 using a communications dock, optical link adapter, or another reader if you align the two readers' receive and transmit signals on their optical serial ports.

optional back
Optional hardware that extends the features of the basic JANUS 2010 reader. Two optional backs are available: the PCMCIA Back provides a Type II PC card drive, and the RF Back provides RF communications.

orientation
The alignment of a bar code symbol with respect to the horizontal dimension. Two possible orientations are horizontal with vertical bars and spaces (picket fence) and vertical with horizontal bars and spaces (ladder).

OSI model
Open Systems Interconnection reference model. A framework developed by the International Standards Organization (ISO) to provide worldwide standards for computer communications.

Output mode
The type of output protocol that is selected with the 7350 software.

overhead
In a bar code system, the fixed number of characters required for start, stop, and checking in a given symbol. For example, a symbol requiring a start/stop and two check characters contains four characters of overhead.

packet
The unit of information by which the network communicates. A single network message with its associated header, addressing information, data, and optional trailer. A packet can also be called a frame or datagram.

page
A group of labels that are always printed together. When labels on a page share the same data, it reduces the number of commands that must be sent to the printer.

PAK
Program acknowledgment character. Sent from the reader when the received IRL program compiles with no errors.

parallel
A communication scheme in which the bits of a byte are transferred simultaneously over a multistrand cable.

parameters
1. The operating limits of a device, such as a printer. Also, the variable information sent with a command. 2. In programming, a value assigned to a variable either at the beginning of an operation or before an expression is evaluated by a program.

parity
A system for encoding characters with odd or even bar code patterns. Parity provides a self-checking feature in bar codes and other data transmission techniques. Even parity characters have an odd number of binary ones in their structure. For the purposes of data processing and data communications, parity does not relate to whether the original character is odd or even, but how an individual character is made odd or even with the addition of one more bit (1-0).

parity bit
A parity bit is added to the binary array to make the sum of all of the bits always odd or always even for a fundamental check.

parity bit/bar/module
A parity bit is added to a binary array to make the sum of all of the bits always odd or always even for a fundamental check.

PCB
Printed circuit board. A flat board whose front contains slots for integrated circuit chips and connections for a variety of electronic components, and whose back is printed with electrically conductive pathways between the components.

PC card
A PC card is similar to a floppy disk. You can use Type I or II memory PC cards and Type II expansion PC cards. Memory cards provide additional disk storage space, not more executable conventional memory. Expansion cards (also called I/O cards) allow you to connect the reader to I/O devices. PC cards were previously called PCMCIA cards.

PCMCIA
Personal Computer Memory Card International Association. This group of manufacturers has defined a set of hardware and software standards for memory and expansion PC cards that are available for personal computers.

PCS
Print contrast signal. A measurement of the ratio of the reflectivities between the bars and spaces of a symbol, commonly expressed in percent. PCS is calculated as:

RL : RD x 100 percent
where RL = reflectivity of the light elements and RD = reflectivity of the dark elements

PC Standard communications protocol
A communications protocol that handles data transfer on a character-by-character basis or by either filling a receive buffer or transmitting a buffer of data. This protocol is designed to be compatible with the standard PC BIOS functions. The one exception is that the PC Standard protocol can buffer data that is received to avoid losing characters if a program has not checked for data recently.

PDF 417
A two-dimensional stacked symbology. Each row in the symbol includes start/stop characters, row identifiers, and symbol characters, which consist of four bars and four spaces each and contain the actual data. PDF 417 provides an extensive error detection and correction option that can recover up to 510 characters lost due to a damaged label or to an error in scanning.

peer-to-peer network
A type of LAN whose workstations are capable of being both clients and servers.

peripheral
A peripheral is a device connected to a computer; for example, a terminal or printer.

physical RAM drive
See RAM drive.

PIC
Peripheral interface controller. The PIC processor is an internal processor that manages the terminal's batteries.

picket
A method of bar code printing in which all the bars are printed at once, in parallel. The bar code appears across the width of the label. Used to be referred to as "drag."

pitch
1. The number of characters printed in one horizontal inch determined by the increment by which the printer platen moves. 2. Rotation of a bar code symbol about an axis parallel to the direction of the bars.

pixel
One spot in a rectilinear grid of thousands of such spots that are individually "painted" to form an image produced on the screen by a computer or on paper by a printer. A pixel is the smallest element that display software can manipulate in creating letters, numbers, or graphics.

Plessey Code
A bar code symbology that is fixed length, continuous, and not self-checking. It is used extensively in libraries. The character set is 0 - 9 plus six additional symbols. This symbology includes a start character, data characters, an eight-bit cyclic check digit, a termination bar, and usually a reverse start character. Similar to MSI code.

point size
A unit of measurement for font height; 72 points equals 1 inch as measured from slightly above the top of the uppercase letters to slightly below the bottom of the lowercase descenders.

Point-to-Point Protocol
Communications protocol typically used to connect the reader directly to a computer or terminal. Data sent by the reader is followed by a carriage return and line feed (CR LF). XON/XOFF is supported. Point-to-Point protocol characters cannot be modified; however, the transmission parameters, such as parity and data bits, can be modified.

POL
Poll character. Sent by the host to request reader data. For User Defined Multi-Drop protocol, you must define a unique character for each reader on a data line.

poll sequence
A controller command to a polled device that tells the device to send data.

polled device
A device in a network that transmits data in response to an initialization from the controller. If the POL character is not enabled, all Intermec readers and printers will transmit data when the operating system of the device requires data to be transmitted.

polling
The act of a computer (or controller) asking end devices if they have information to send to the computer (or controller.)

Polling Mode D
A protocol that allows devices and controllers to exchange data in an "ask and receive" format. Polling Mode D is used to connect multiple devices to a single multiport controller.

port
For hardware, a connecting component that allows a microprocessor to communicate with a peripheral device. For software, a memory address that identifies the physical circuit used to transfer information between a microprocessor and a peripheral device.

port concentrator
A device that continuously polls for transactions and passes those transactions to the host. A port concentrator can control from 1 to 16 devices from one master communications port at a time. It also performs the function of time-stamping each transaction.

portability
The ability of an ERP system to run various operating systems, databases, and networks without making major adjustments or limiting functionality.

POS
Point of sale.

POST
Power-on self test. This test runs when you boot the terminal. The test ensures that the terminal's hardware and peripherals are operational.

postamble
A field of data that is sent after the data in a message. It is typically used to tag transactions from the bar code reader for rapid processing by the host, and it expands the data field (record) length. See also preamble.

Postnet Code
A "height modulated" symbology used primarily by the U.S. Postal Service for sorting mail. All bars and spaces are the same width, and ZIP code information is encoded into the particular arrangement of tall and short bars.

power management
Software and procedures that extend the life of a terminal or reader's main battery pack and backup battery.

preamble
Predefined data that is automatically appended to the beginning of transmitted data. When preamble is enabled, you must enter a valid Preamble A or B before the reader will send data to the computer. See also postamble.

Precision Print™
Trademarked term Intermec uses to describe the software and adjustable hardware features of the 3240 printer that enable it to print high registration labels.

preferred tree
The tree you specify that you first want to connect to in a NetWare 4.X network if you have multiple trees. If this tree has a server with a free connection, the NetWare DOS Requester attaches to it.

pre-printed symbol
A symbol that is printed before use, either on a label or on the article to be identified.

presentation space
The physical space being displayed by the terminal emulator session.

print quality
The measure of how a bar code symbol adheres to the requirements of dimensional tolerance, edge roughness, spots, voids, reflectance, PCS, quiet zone, and encoding.

print speed
Measured in inches per second (IPS), the rate at which media travels past the printhead.

printer
A device controlled by a computer that makes images appear on media. The images can be formed by heat transfer (thermal) or by striking an image on a wheel (impact.)

printhead
The mechanism inside the printer that prints.

printhead elements
The parts of the printhead that print by placing a mark on the label when heated. In a 3400 printer, ech element is 0.005 square inches in area and is switched on and off separately in order to react with the media or thermal transfer ribbon to create a mark on the label.

printhead range
The range over which the resistance of the wires that carry energy to the printhead elements can vary before sending a warning. The wires are tested with each printhead test.

printhead test
A test that takes place each time the printer is turned on, or receives a specific command from the host. This test makes sure the resistance of the wires that carry energy to the printhead elements are within the acceptable range, which ensures the temperature of the elements is within the acceptable temperature range.

program (n.)
See application.

PROM
Programmable read only memory. A memory chip that can be programmed once, but cannot be reprogrammed.

protected field
In word processing, preset data or an area that cannot be changed or overridden by an operator without altering the program. On a display device, a display field in which a user cannot enter, modify, or erase data. See also unprotected field.

protocol
The rules for communication between like processes, providing a means to control the orderly communication of information between stations on a data link.

See ASCII control character.

protocol handler
A protocol handler provides communications services that let a device send data to other devices by transmitting and receiving data as specified by the communications protocol.

protocol response
A message from an application or device that either acknowledges the receipt of a transaction, confirms that the transaction was not processed, or sends a message back to the source of the transaction.

protocol stack
A group of drivers that work together to span the layers in the network protocol hierarchy.

PSK
Programmer's Software Kit. A library of software functions for creating applications.

PSS
Program statement separator character. The PSS indicates the end of an IRL program statement. It separates individual IRL program statements from one another in a block of IRL program statements. PSS must not be defined same as the EOM.

PutImage
One of two programs you can use to change the contents of drive C. PutImage places an image file created with MkImage on the reader. You can run PutImage only on the reader.gration by establishing and publishing standards, such as the business object document, for integration of business objects across an enterprise.