Atoms in the same period have the same number of energy levels, which also helps scientists predict how an atom will interact with other atoms. In Dimitri Mendeleev's periodic table, elements in the same vertical group have _____.
NonVisual Desktop Access (NVDA) is a free, open source, portable screen reader for Microsoft Windows. The project was started by Michael Curran in 2006. NVDA is programmed in Python. It currently works exclusively with accessibility APIs such as Microsoft Active Accessibility, IAccessible2 and the Java Access Bridge, rather than using specialized video drivers to intercept and interpret visual information. It is licensed under the GNU General Public License.
This article is designed to help users who are new to NonVisual Desktop Access (NVDA) learn the basic controls for testing web content, and to serve as a reference for the occasional NVDA user. NonVisual Desktop Access (NVDA) is a free and open source screen reader for the Microsoft Windows operating system.