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High-Tech Dictionary >>
Word Definition
Datalog
Datalog is a query and rule language for deductive databases that syntactically is a subset of Prolog. Query evaluation with Datalog is sound and complete and can be done efficiently even for large databases. Query evaluation is usually done using bottom up strategies. For restricted forms of datalog that don't allow any function symbols, safety of query evaluation is guaranteed.
Dating Software
Dating software refers to software that powers a dating website. This software runs on the server (computer) that hosts the dating website.
DB/DC: Database/Data Communications
Database/Data Communications (DB/DC) refers to the software system that has both database and communications capabilities.
DB: Database
Database(DB) is a collection of organized information and data. In computer industry, database is an electronic filing system. Various techniques are used to model data structure. Most database systems are built around one particular data model, although it is increasingly common for products to offer support for more than one model. Traditional databases are organized by fields, records, and files. A field is a single piece of information; a record is one complete set of fields; and a file is a collection of records.
DB2: DataBase 2
DB2, abbreviated from DataBase 2, is a relational database system developed by IBM Corporation, originally for use on large mainframe computer systems. It has since been ported to a variety of platforms including SunOS, Solaris, Linux, Windows 95/98/NT/2000 and HP-UX. DB2 can be administered from either the command-line or a GUI. DB2 has APIs for .NET CLI, Java, Python, Perl, PHP, Ruby on Rails, C++, C, REXX, PL/I, COBOL, RPG, FORTRAN, and many other programming languages. DB2 also supports integration into the Eclipse and Visual Studio .NET integrated development environments.
DBA: Database Administrator
A database administrator (DBA) is a person who is responsible for the environmental aspects of a database. The duties of a database administrator varies depending on job description, corporate and Information Technology (IT) policies and the technical features and capabilities of the database management systems (DBMSs) being administered. They nearly always include disaster recovery (backups and testing of backups), performance analysis and tuning, and some database design or assistance thereof.
DBase
DBase is a commercial relational database management system intruduced first by Ashton-Tate corporation in the early 1980s and now belongs to the dBase Corporation. DBASE was never able to make transition successfully to Microsoft Windows and was eventually displaced by newer products like Paradox, Clipper, FoxPro, and Microsoft Access.
DBCS: Double-Byte Character Set
Double-Byte Character Set (DBCS) is a type of character encoding scheme which uses 16-bits (two-bytes) rather than 8-bits (one-bytes) characters. Using double-byte characters expands the possible number of combinations of 1s and 0s from 256 (as in ASCII) to 65,536 (or 256 x 256). Double-byte character sets are needed for such languages as Japanese, Chinese, and Korean. DBCS has different flavors, for example, double byte for ALL characters (including control character), or double byte only for image characters.
DBI: DataBase Interface for Perl
The DBI (DataBase Interface) is the standard database interface module for Perl programming language. It defines a set of methods, variables and conventions that provide a consistent database interface independent of the actual database being used. The DBI and DBD Perl packages allow Perl programmers to view the many database environments that are on the market in a uniform way.
defragmentation
When you use the same file over and over again, writing, rewriting, saving, and deleting parts of it on the same disk, the file becomes fragmented. That means that although you can't tell, your operating system is storing all the data from that file as separate packages of information, distributed on different parts of the disk. Although fragmentation does not lose the information contained in the file, it does eventually slow down access to the file itself, because the OS must search the whole disk to create the sum of the file's parts. Defragmentation collects all those parts into one stream of data again, speeding up your system.
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Word : E911
Explanation : E911 or Enhanced 911 allows cellular phone and VoIP callers to call 911. Besides, E911 allows tracking the position of the caller as well. A 911 call is usually routed to what is known as the Public Safety Answering Point or PSAP. In turn, the PSAP routes calls forward. Until the mid 1990s, cell phone users could not connect directly to the PSAP. However, an FCC ruling in 1996 mandated cell phone providers to route E911 calls directly to the PSAP. The FCC in 2005 also ruled that VoIP services provide users with the E911 capability. To do so, 911 calls are required to connect to the regular phone network.
 
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Tech Word for Today
 Word : 0KB.IN
 Explanation : 0KB.IN - Free Knowledge Base of Internet
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