Income derived from Social Security is currently estimated to keep roughly 20% of all Americans, age 65 or older, above the Federally defined poverty level. The Social Security Administration is headquartered in Woodlawn, Maryland, just west of Baltimore.
Control is the term used to describe an object in a window or dialog box. Controls include push buttons, scroll bars, radio buttons and pull-down menus.
In science, the control variable is the one factor in an experiment that the researcher holds steady in an effort to isolate the effect that is being studied. According to About.com, it is also sometimes referred to as the constant variable.