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

Chapter 1 37

Glossary of Terms

2. Standards that allow systems to connect to each other (for example, RS

232-C).

interleave A method of writing data to a disk device that improves data access speed.

International Association of Hewlett-Packard Computer Users (INTEREX) An

independent organization formed for the purpose of exchanging techniques

and ideas among users of Hewlett-Packard computers.

International Standards Organization (ISO) An organization established to promote

the development of standards and to facilitate the international exchange

of goods and services. ISO created the Open Systems Interconnection

(OSI), a seven-layer approach to network architecture.

internetwork communication Communication between networks. See catenet.

internetwork protocol (IP) The network services (NS) protocol based on the Defense

Advanced Research Projects Agency's (DARPA) standard. IP is primarily

used to route messages between networks using gateways. It provides

gateway-to-gateway routing, store-and-forward service between gateways,

and message fragmentation and reassembly between source and

destination networks.

interprocess communication (IPC) An MPE ﬁle system facility that allows processes

to communicate with one another.

interrupt A signal that stops the current process and demands immediate attention

(so that it gets processed).

intrinsic A system routine accessible by user programs providing interface to

operating system resources and functions. Intrinsics perform common

tasks such as ﬁle access, message formatting, or data conversion.

intrinsic call The method used to invoke, or call, an intrinsic from within a program.

I/O bay A cabinet containing the card cages and device controller boards for

peripherals connected to the HP 3000. See card cage.

I/O dependent code (IODC) Contains I/O module dependent data, and code used by

processor-dependent code (PDC) in conﬁguring the I/O module and booting

the system.

I/O error A data transmission error between a computer and peripheral. Examples

of I/O errors are baud rate or parity mismatch, and incorrect syntax in

device-control instructions.

I/O interface card See device adapter.

I/O path The address of the interface hardware and the physical path to reach a

device. It is constructed top down from where the device is physically

attached to the system. The path is determined by the CIO adapter

module number, the device adapter (DA) slot number, and the device

address.

ISQL The interactive interface to ALLBASE/SQL, the relational interface to

ALLBASE/SQL.

job A job is a method of submitting multiple operating system and utility