Combo box

Image:Combo [box example.PNG|thumb|A generic combo box]
A combo box is a commonly used graphical [user interface] widget. Traditionally, it is a combination of a drop-down list or list box and a single-line editable textbox, allowing the user to either type a value directly or select a value from the list. The term "combo box" is sometimes used to mean "drop-down list". In both Java and.NET, "combo box" is not a synonym for "drop-down list". Definition of "drop down list" is sometimes clarified with terms such as "non-editable combo box" to distinguish it from "combo box".
To make a combo box like shown in the image above in HTML, one can write the following code: