Xerox 180 IPS manual software application, See application software

GLOSSARY

raster output scanner (ROS) Raster output scanner. A motor–driven laser scanning system.

Read-Only Memory (ROM) Solid-state memory for programs. It cannot be rewritten.

read/write head A small electromagnet that reads, writes, and erases data in the form of magnetic dots on the surface of an external storage medium, such as a magnetic disk.

real time To process transactions as they are entered into a system. User and system interchange allow transactions to be processed and the results returned to the user.

resolution The number of dots per unit. An imaging system converts a character from digitized data into a printed image composed of these tiny dots. The greater the number of dots per inch (i.e., higher the resolution), the clearer the image is produced.

sequencing Method of ordering messages, records within a file, or statements in a program according to rank or time of entry.

sequential In numeric sequence, usually in ascending order. As applied to a file organization, describes files in which records are written one after another and cannot be randomly accessed. For example, the first 99 records in a sequential file-access file have to be read before the 100th record is accessible.

short-edge feed (SEF) The movement of paper through the printer in the direction of the paper width (the shorter side of a sheet of paper).

simplex printing Printing on one side of the page. See also duplex printing.

small computer system interface (SCSI) An accepted standard for connecting devices to computers.

software Programs, including operating systems, procedures, utilities, applications programs, etc., written for a system.

software application See application software.

spooling Process of releasing data from main memory and storing it temporarily until a peripheral device is ready to accept it, e.g., storing text before sending it to a printer.

string Connected sequence of alphanumeric characters treated as one unit of data by a program.

SunOS Operating system developed primarily by Sun Microsystems for use on Sun computers and workstations. SunOS provides inherent support for UNIX and for TCP/IP.

XEROX DOCUPRINT 96/4635/180 IPS INSTALLATION PLANNING GUIDE GLOSSARY-13