UAP – Universal Access Point
UCC – Uniform Code Council
An organization that develops and maintains standards for the effective management and control of Supply Chains. The UCC also issues UPC numbers to manufacturers.
The UCC has published the 2005 Sunrise Date initiative.
The UCC is now GS1.
| The US version of GS1: |  |
UCC/EAN-128 is a globally accepted standard for a data structure for exchanging data from different companies. A typical UCC/EAN-128 data structure has the following format:
| UCC/EAN-128 itself is not a barcodesymbology. It is a specification that describes a format of data in a Code 128barcode. |
UDP – User Datagram Protocol
UDP is a communications Protocol that offers a limited amount of service when messages are exchanged between computers in a network that uses the Internet Protocol (IP). UDP is an alternative to the Transmission Control Protocol (TCP) and, together with IP, is sometimes referred to as UDP/IP. Like TCP, UDP uses the Internet Protocol to actually get a data unit (called a datagram) from one computer to another. Unlike TCP, however, UDP does not have all of the overhead such as error checking and transmission retries. As a result, UDP is much faster than TCP but not as reliable.
Network applications that want to save processing time because they have very small data units to exchange (and therefore very little message reassembling to do) may prefer UDP to TCP. The Trivial File Transfer Protocol (TFTP) uses UDP instead of TCP.
UHF – Ultra High Frequency
UHF is a Frequency range in the electro magnetic spectrum running from 300MHz to 3GHz. In the ADC industry, UHF typically refers to the band extending from 400MHz to 450MHz.
These radios are crystal based. These crystals must be grown and on occasion re-aligned because they have a tendency to drift.
Its radio output power of 1 to 2 watts yields an effective rangeof one to two miles. Because of this, a site license is required from the FCC in order to use UHF radios in a data collection application.
The data rate is about 19.2Kbps or less.
UHF Gen2 – UHF Generation 2
Relating to RFID, UHF Gen2 is a global, open standard from EPC global that specifies RFID Transponders (tags) that have:
- faster read rates
- smaller chips
- higher reliability
- better read algorithms
- kill security
- improved write capability
- more memory than Generation 1 tags.
Undecoded scanners collect raw count data and transmit it to some other device, a decoder, that then converts the data and into ASCII data.
Unix is an operating system that originated at Bell Labs in 1969 as an interactive time-sharing system. Ken Thompson and Dennis Ritchie are considered the inventors of Unix. The name (pronounced YEW-nihks) was a pun based on an earlier system, Multics. In 1974, Unix became the first operating system written in the C language. Unix has evolved as a kind of large freeware product, with many extensions and new ideas provided in a variety of versions of Unix by different companies, universities, and individuals, such SCO Unix, Sun Microsystems Unix, and Linux.
Because Unix is not owned by anyone, it became the first openor standard operating system that could be improved or enhanced by anyone.
UPC – Universal Product Code
UPC is a Barcode Symbology that encodes numeric data only. It is used primarily in the retail industry to barcode products. There are two versions of UPC, UPC Version A which is a 12 digit symbology and UPC Version E which is a 6 digit symbology.
See Symbologies (List) for a list of common symbologies.
UPS – Uninterruptible Power
An UPS is a device that allows your computer to keep running for at least a short time when the primary power source is lost. It also provides protection
from power surges. A UPS contains a battery that "kicks in" when the device senses a loss of power from the primary source. If you are using the computer when the UPS notifies you of the power loss, you have time to save any data you are working on and exit gracefully before the secondary power source (the battery) runs out.
When all power runs out, any data in your computer's random access memory (RAM) is erased. When power surges occur, a UPS intercepts the surge so that it doesn't damage your computer.
URL – Uniform Resource Locator
A URL identifies a file that can be accessed via the Hyper Text Transfer
Protocol (
HTTP), in other words, web pages.
It’s that thing you type in your web browser to get to a particular web page.
USB – Universal Serial Bus
USB (Universal Serial Bus) is a plug-and-play
Interface between a computer and add-on devices (such as audio players, joysticks, keyboards, telephones, scanners, printers, and barcodescanners). With USB, a new device can be added to your computer without having to add an adapter cardor even having to turn the computer off. The USB peripheral busstandard was developed by Compaq, IBM,
DEC , Intel, Microsoft, NEC, and Northern Telecom and the technology is available without charge for all computer and device vendors. USB supports a data speed of 12Mbps per second. This speed will accommodate a wide range of devices, including MPEG video devices, data gloves, and digitizers. It is anticipated that USB will easily accommodate plug-in telephones that use
ISDN and digital PBX.
Some
Barcode scanners are available with a USB interface.
UTP - Unshielded Twisted Pair
UTP cable is used for analog and digital communications. Flat gray UTP cable is used for phone lines and thicker UTP cable of various colors is used for digital networking. UTP cable has two to four pairs of wires, each pair is twisted around each other. UTP has no metallic shielding around the pairs. Category 5 or CAT5 cable is a popular cable used for networking and has four pairs. This type of cable is used in the IEEE 10BASE-T and 100BASE-T specifications for wired Ethernetnet works.
