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.
NVDA is a free, open source screen reader. A screen reader is, in this case, a software program that makes a computer talk, allowing blind or visually empaired people to use computers. NVDA is a very small program that can run on systems running Windows XP or Windows Vista, and it is ultra portable. It is written in the Python Programing language, allowing those who actively develope NVDA to do so very rapidly. NVDA stands for Nonvisual Desktop Access. The NVDA project is sponsered by NVAccess.