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Glossary
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UART. Pronounced u-art, and short for universal asynchronous receiver-transmitter, the UART is a computer component that handles asynchronous serial communication. Every computer contains a UART to manage the serial ports, and all internal modems have their own UART. As modems have become increasingly fast, the UART has come under greater scrutiny as the cause of transmission bottlenecks. If you are purchasing a fast external modem, make sure that the computer's UART can handle the modem's maximum transmission rate. The newer 16550 UART contains a 16-byte buffer, enabling it to support higher transmission rates than the older 8250 UART.
UMTS. Universal Mobile Telecommunications System is a Third Generation (3G) mobile technology that will deliver broadband information at speeds up to 2 Mbits/sec. Besides voice and data, UMTS will deliver audio and video to wireless devices anywhere in the world through fixed, wireless and satellite systems. UMTS services will launch commercially sometime in the year 2001.
UNI. A term used in ATM and Frame Relay networks, UNI is the interface between the ATM end user and a private ATM switch. It also can represent the interface between a private ATM switch and the public carrier ATM network.
Unicode. A new "universal" standard for sharing information between different programs and computers. Unicode is meant to replace the ancient ASCII standard and includes all the characters represented by the ASCII standard as well as additional characters for displaying languages such as Greek, Hebrew, Arabic, Russian (which uses Cyrillic), Chinese, Japanese, and Korean.
URL. An acronym for Uniform Resource Locator. The site and file-addressing scheme for the World Wide Web. An internet addressing convention that originated with the World Wide Web. (The basic format is protocol://servername/pathname.)
USENET. An acronym for USEr NETwork. A network linking computers together to share discussion groups. This network, known as UseNet, evolved into a series of newsgroups that were shared among computers.
user ID. The user ID is a number or code work assigned to you by the system administrator or one you make up yourself. It is used to tell the computer who you are, often in place of your name.
utility. Software intended to help you fix, tweak, or enhance your system.
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