It implies software that integrates operating system and application functions. Such software does not provide an interface with the user. See: firmware. (2) The conditions that affect the performance of a system or function. buy cialis error detection. Techniques used to identify errors in data transfers. exception. (IEEE) An event that causes suspension of normal program execution.

exception. (IEEE) An event that causes suspension of normal program operation. extended ASCII. The second half of the ACSII character set, 128 thru 255. These standards are intended to be binding only upon federal agencies. fiber optics. Communications systems that use optical fibers for transmission. A field is a component of a record. A record is a component of a database. hierarchy of input-processing-output chart. See: input-process-output chart. Checklists are a typical vehicle used in accomplishing this technique. An organization involved in the generation and promulgation of standards.

IDE controllers are functionally equivalent to ST-506 standard controllers. (3) A peripheral device which permits two or more devices to communicate.

International Telecommunications Union - Telecommunications Standards Section. A method for handling constantly changing data. Contrast with polling. For example, the compilation, loading, and execution of a computer program. and operate a system from its conception to the termination of its use. See: adaptive maintenance, corrective maintenance, perfective maintenance. megahertz. A unit of frequency equal to one million cycles per second. It derives its name from its use of metal, oxide and semiconductor layers.

There are several varieties of MOS technologies including PMOS, NMOS, CMOS. microcomputer. A term used to describe a small computer. See: microprocessor. modem. (ISO) A functional unit that modulates and demodulates signals.

Syn: functional decomposition, hierarchical decomposition. See: abstraction. (3) A packaged functional hardware unit suitable for use with other components. Syn: parallel processing. Contrast with multi-tasking. See: time sharing. National Institute for Standards and Technology. Gaithersburg, MD 20899. network. (1) (ISO) An arrangement of nodes and interconnecting branches. octal. The base 8 number system. Digits are 0, 1, 2, 3, 4, 5, 6, & 7. original equipment manufacturer. A manufacturer of computer hardware. parallel. (1) (IEEE) Pertaining to the simultaneity of two or more processes.

The device must wait until it is polled in order to send or receive data. It is the result of resolution and stability. See: accuracy, bias, calibration.

program. (1) (ISO) A sequence of instructions suitable for processing. programmable logic device. A logic chip that is programmed at the user's site. programming language. (IEEE) A language used to express computer programs.

read only memory. A memory chip from which data can only be read by the CPU. This advantage applies to all types of ROM chips; ROM, PROM, EPROM, and EEPROM. Contrast with batch. See: conversational, interactive, interrupt, on-line. (3) A documented representation of a condition or capability as in (1) or (2). Types include system requirements review, software requirements review. See: execution trace, subroutine trace, symbolic trace, variable trace. risk. (IEEE) A measure of the probability and severity of undesired effects.

routine. (IEEE) A subprogram that is called by other programs and subprograms. Note: This term is defined differently in various programming languages.

server. A high speed computer in a network that is shared by multiple users. software requirements specification. See: specification, requirements. Contrast with object code. See: source program, programming language. spaghetti code. Program source code written without a coherent structure. Contrast with design standards, requirement. See: software design description. (2) A specification expressed in a requirements specification language.

Often part of a requirements specification. Contrast with requirement. These characteristics typically include speed, accuracy, and memory usage. Note: The result is not necessarily the same as that shown in a call graph. Syn: hierarchy chart, program structure chart. Contrast with call graph. See: execution trace, retrospective trace, subroutine trace, variable trace. synchronous. Occurring at regular, timed intervals, i.e. timing dependent. Equipment within the system is kept in step on the basis of this timing. tape. Linear magnetic storage hardware, rolled onto a reel or cassette.