From U to V
Universal asynchronous receiver/transmitter. A device that performs
asynchronous communication functions by converting parallel digital
output from a DTE into serial bit transmission and vice versa.
Universal Asynchronous Receiver/Transmitter buffer. The UART buffer
contains bytes of data being sent or received by the reader. The
FIFO control register controls how the UART buffer operates.
User-defined character. See graphic.
User-defined fonts. See soft font.
1. User-defined protocol. UDP is a custom communications protocol
that can be modified to meet specific host requirements. For example,
you can configure User-Defined protocol to act like a Point-to-Point
protocol, except that it requires an LRC and an acknowledgement
from the receiver. You can also define the communications characters
such as SOM, POL, or SEL, or disable these characters by setting
them to null. 2. User datagram protocol. This protocol is an alternative
to TCP. This protocol is the Internet standard for wireless devices.
You can use UDP when you do not need a guaranteed delivery. You
can also use UDP when you do not require all the services of TCP.
User datagram protocol plus. This Intermec-designed protocol is
based on UDP. UDP Plus provides robust wireless connectivity between
Trakker Antares terminals, JANUS devices, 502X computers, and controllers/servers.
Previously the Uniform Product Code Council; the organization that
administers the UPC and other retail standards.
The current series of symbology specifications published by AIM;
they now include USS-Interleaved 2 of 5, USS-39, USS-93, USS-Codabar,
UNIX user name
Parameter that is a variable in the DOS environment. The UNIX user
name identifies the user to the Novell software running on a remote
A displayed field in which a user can enter, modify, or delete data.
See also protected field.
Universal product code. A numeric, 12-digit bar code symbology used
extensively in retail, particularly the grocery industry.
A UPC symbol that encodes a number system character, 10 digits of
data and a check digit.
A UPC symbol that encodes six digits of data in an arrangement that
occupies less area than a UPC-A symbol. Also called a "zero-suppressed"
symbol, because a 10-digit UPC-A code can be compressed to a six-digit
UPC-E format by suppressing redundant zeros.
Universal product code (UPC) is a subset of the European article
numbering (EAN). The EAN code is also referred to as world product
code (WPC) and international article numbering (IAN). It is used
in marking items for retail sale. This code is fixed length, continuous,
and weakly self-checking. It requires close printing tolerances.
The character set is 0 - 9. Its maximum character density is 13.8
numeric characters per inch.
1. A device that is at the computer end of a connection between
a computer and a device is referred to as being upline. When devices
are connected to a computer, they are connected in a line. Upline
is a direction relative to the device, in contrast to downline.
2. If more than one computer is connected in a line, the upline
computers usually handle data processing and the downline computers
usually handle data collection and sometimes some data preprocessing.
The area between the 640K and 1024K. The upper memory area is physically
composed of a 256K flash ROM chip (system flash) and the video memory
chip. Like a PC, this area contains the BIOS and video buffers.
On the reader, the upper memory area also contains PC card memory
and ROM DOS. The 384K upper memory area maps just above 640K conventional
A program that provides general computing functions, such as file
copying and program cross referencing. See also application.
Comparing data with known information (patterns, ranges, check digits)
to verify that the data is correct.
An ASCII file that has one entry per line. A validation file is
used to ensure that the information entered in the input fields
of a screen mapping screen are correct. The file is read sequentially
and the last line in the ASCII file must be .
Bar code and text fields that change from one label to the next.
A type of symbology in which the number of characters per symbol
is not restricted. It is the opposite of fixed length.
A code that can be of any length within a range of lengths, commonly
with a maximum length specified and frequently with a minimum length
A data field or data element that may vary within a prescribed minimum
Standard 12-digit UPC symbol.
Special 6-digit shortened UPC code that requires less space and
uses zero suppression.
A code pattern oriented so that the axis of the symbol is perpendicular
to the horizon.
A method for viewing a full size terminal or reader screen with
the display. You see only a limited number of lines and characters
of data at one time. Use the display as a viewport to move around
and see the entire screen.
A PC-size screen (25 x 80) accessible through the reader's smaller
display for applications that need to be PC compatible. You can
see 16 rows and 20 characters of the virtual display at one time.
By moving the viewport, you use the reader's virtual display of
25 lines by 80 characters-the same size as a PC screen.
A Reader Services feature that lets the reader decode bar codes,
making the reader functionally equivalent to a wedge reader connected
to a PC.
Vehicle mount unit. A device that is designed to be mounted on a
The absence of ink in a printed bar.
Refers to memory that is not saved when power is lost or turned
off. See also nonvolatile.
A laser scanner parameter that takes more than one (low setting)
or one more than low (high setting) matching scans from the same
label to yield a good read. This is useful when scanning poor quality
labels that may cause substitution errors. This is for laser scanning
A straight-through terminal emulation that causes Intermec downline
devices running terminal emulation to emulate a VT100, VT220, and
VT320, or ANSI terminal.