a) A variable which may take one of a large range of values.

A variable which can take one of only two values is a flag and not a parameter. b) The values shown in X, Y, and Z in each menu, so called because they represent the numerical values assigned to each feature of a video picture, size, aspect ratio, etc. Changing these values, shown in the “X, Y, and Z” columns, produces ADO’s visual effects. c) A setting, level, condition, or position, i.e., clip level, pattern position, system condition.

d) Value passed from one routine to another, either in a register or a memory location.