96
Appendix C
reset To turn off, deactivate, disable, or return to a
previously determined state.
resolution A measure expressing the number of units in a given
range used to create an image. In printing, this is
expressed as the number of dots per inch (dpi)
horizontally and vertically.
ROM Read-Only Memory. Programs, instructions, and
routines permanently stored in the printer. ROM is
not lost when power is turned off and cannot be
written to-hence the term “read-only.” ROM-resident
fonts are fonts permanently stored in a printer and
available at any time. See also RAM.
roman A type style in which the characters are upright. This
is sentence is printed in a roman type style.
RTS Request To Send. Control signal from the printer.
S
SA Set Attribute
SAA System s Application Architecture
sans serif A typeface or font in which the characters do not
have serifs. This font is sans serif.
SCS System Network Architecture (SNA) Character
String. Usually commands to set printer format, etc.
serial communications The sequential transmission of data, in which each
element is transferred in succession.
serial matrix A type of printing technology used in some impact
printers. Data are sent to the printer through either a
serial or a parallel interface, but the print head must
receive the data serially in order to form each
character. The moving print head uses pins to form
whole characters one at a time and one after the
other. The pins print dots according to programmed
matrix patterns. A line matrix printer also forms
characters with dots in matrix patterns, but it feeds
print data in parallel to many hammers mounted on a
rapidly oscillating shuttle. The hammers fire
simultaneously to print entire lines at a time.
serif A short line stemming from and at an angle to the
upper or lower end of the stroke of a letter or number
character.
set To turn on, activate, invoke, or enable.
A