A minimum basis set is one in which, on each atom in the molecule, a single basis function is used for each orbital in a HartreeâFock calculation on the free atom. However, for atoms such as lithium, basis functions of p type are added to the basis functions corresponding to the 1s and 2s orbitals of the free atom. For example, each atom in the second period of the periodic system (Li-Ne) would have a basis set of five functions (two s functions and three p functions).
Microsoft first released Visual Studio (codenamed Boston, for the city of the same name, thus beginning the VS codenames related to places) in 1997, bundling many of its programming tools together for the first time.
The first independent version of Microsoft Windows, version 1.0, released on 20 November 1985, achieved little popularity. It was originally going to be called Interface Manager but Rowland Hanson, the head of marketing at Microsoft, convinced the company that the name Windows would be more appealing to customers.