You would like to conduct a survey and ask your web page visitors to indicate the computer operating systems that they use. each visitor could use more than one computer operating system. select the form control that is best to use for this purpose.
2 . check box
. . radio button
. . text box
. . scrolling text box

A checkbox

Explanation:

A checkbox (check box, tick box, tick box) is an User interface widget that allows the user to choose a binary option.

Like a choice between any of two potential options that are mutually exclusive.

For instance, on a simple yes / no question, the user may have to answer ' yes ' (checked) or ' no ' (not checked).

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