MPE/iX Glossary of Terms and Acronyms (32650-90887)

Chapter 1 27
Glossary of Terms
2. The name of an MPE/iX command that writes to $STDLIST.
dynamic backup Dynamic backup means that the STORE file set and structures are
accessible for any access while the backup is taking place. Any
modifications made to the STORE file set during the backup are logged
and saved along with the data on the backup medium. On RESTORE, the
data and log file are used to recover the data to a consistent state.
echo What the computer does when it sends data typed on the keyboard back to
the terminal screen. If echo is turned off, the computer receives the data,
but does not send it back, so nothing appears on the screen.
echoplex A mode in the full-duplex communication channel in which any character
transmitted by a terminal is echoed back to it.
EDIT/3000 An HP 3000 text editor, supplied with MPE/iX. It is used to create and
manipulate ASCII files.
editor A word processing application used to prepare, modify, or delete text and
program files. EDIT/3000 is the text editor used with MPE/iX.
EIA 232-C See RS 232-C.
EIA 422-A See RS 422.
electronic mail The transmission of a message from one person to another by way of
computers.
Electronics Industries Association (EIA) An organization that creates North
American data communication standards.
electrostatic discharge (ESD) The electric charge given by the release of integrated
circuits.
end of file (EOF) The marker that indicates the logical end of a file. An end-of-file
marker may be a control character embedded in the data.
end of line (EOL) The mechanism for indicating the end of a line.
end of tape (EOT) A marker on the back of a tape, sensed by the tape drive, indicating
the supply of tape is running low.
entry An element of information in a table, list, queue, or other organized
structure of data.
environment file A disk file containing the formatting specifications for a printed page
of data. These specifications, which are not part of the data, may include
the page size, character fonts, forms, and other requirements to be used in
conjunction with the Hewlett-Packard Laser Printing System.
erasable programmable read-only memory chip (EPROM) An EPROM chip can be
programmed, erased, and reprogrammed.
error checking code On an MPE/iX system, the internal memory word size is 39 bits.
There are 32 bits for data and seven bits dedicated to error detection and
correction. Single-bit errors are automatically detected and corrected
ensuring data integrity. Multi-bit errors are automatically detected
resulting in a high-priority interrupt to the system software for