ALSA Advanced &Linux; Sound Architecture; a &Linux; sound card driver; not currently included with the standard kernel source code. &arts; Analog Real-Time Synthesizer; the name of the multimedia architecture/library/toolkit used by the &kde; project (note capitalization) BSD Berkeley Software Distribution; here refers to any of several free &UNIX;-compatible operating systems derived from BSD &UNIX;. CORBA Common Object Request Broker Architecture; a standard for implementing object-oriented remote execution. CVS Concurrent Versions System; a software configuration management system used by many software projects including &kde; and &arts;. FFT Fast Fourier Transform; an algorithm for converting data from the time to frequency domain; often used in signal processing. Full Duplex The ability of a sound card to simultaneously record and play audio. GPL GNU General Public License; a software license created by the Free Software Foundation defining the terms for releasing free software. &GUI; Graphical User Interface IDL Interface Definition Language; a programming language independent format for specifying interfaces (methods and data). LGPL GNU Lesser General Public License; a software license created by the Free Software Foundation defining the terms for releasing free software; less restrictive than the GPL and often used for software libraries. &MCOP; Multimedia COmmunication Protocol; the protocol used for communication between &arts; software modules; similar to CORBA but simpler and optimized for multimedia. &MIDI; Musical Instrument Digital Interface; a standard protocol for communication between electronic musical instruments; often also used to refer to a file format for storing &MIDI; commands. OSS Open Sound System; the sound drivers included with the &Linux; kernel (sometimes called OSS/Free) or a commercial version sold by 4Front Technologies. &tde; Trinity Desktop Environment; a project to develop a free graphical desktop environment for &UNIX; compatible systems.