
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 | |
| 
 | routines permanently stored in the printer. ROM is | 
| 
 | not lost when power is turned off and cannot be | 
| 
 | written  | 
| 
 | 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 | Systems 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. | 
| 
 | A serif | 
| set | To turn on, activate, invoke, or enable. | 
96