Appendix 2: Glossary
ActiveX control ActiveX is a model for writing programs so that other programs and the operating system can call them. With ActiveX controls, the functionality of Internet Explorer can be extended.
Apache Open Source web server that runs on Windows, Macintosh OS X, and most flavors of Linux/Unix.
API (Application Programming Interface) Programming interfaces that allow access to core functionality by Java, Perl, and Python.
Artifact Undesired degradation of an image/video/sound, mostly due to too much compression.
Atomic transaction Atomic transactions on the server are operations that are ...