IBM 4247 A00 User Manual page 314

V
variable data. Data that can vary. Examples are the names and addresses in form letters. Contrast with constant
data .
X
xerographic paper. A paper that is manufactured specifically for the xerographic process, in which key paper
qualities are carefully controlled.
Z
zero tear. Conserves forms by not requiring the operator to tear off any of the forms when parking or changing forms
types.
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4247 Printer Model A00 User's Guide