apple-pascal-1.3-manual

default: The value used by thesystem when the user has a choicebut does not exercise it.delimiter: In Pascal, a symbol thatacts as punctuation to separatesymbols, statements, or expressionsfrom each other. An operator mayalso be a delimiter. In the Editor, asingle character that marks both thebeginning and end of a text stringbut that is not part of the text string.device: A piece of hardware usedfor data input or output. A videomonitor, printer, and disk drives arecommonly used devices.dimension: An ordered quantity bywhich the elements of an array areidentified. An array may have morethan one dimension.directory: A section on a disk thatcontains information about the fileson that disk, including filenames,each file's length, last modificationdate, and file type. Each time a fileis created or modified, informationabout the file is recorded in the diskdirectory.disk: A generic term for massstorage devices using rotatingmagnetic storage media. Thisincludes flexible disk and rigid diskstorage.disk file: A collection of data on adisk, listed by name in the diskdirectory.don't-care byte: Represents anonnegative integer less than 128;thus it can be treated as SB (signedbyte) or UB (unsigned byte).dynamic allocation: The processof reserving storage space inmemory while a program isexecuting.dynamic chain: A series ofdynamic links. The dynamic chaindescribes the "route" by which aprocedure was called.dynamic link: A pointer in a calledprocedure's markstack that pointsto the markstack of the callingprocedure.dynamic variable: A variableexplicitly allocated by the program.Dynamic variables are allocated onthe heap.embedded: Contained within.evaluation stack: A data structureused to pass parameters, to returnfunction values, and as an operandsource for many P-machineinstructions. The evaluation stackgrows downward.execute: To perform the actionsspecified by a program command orsequence of commands.execution time: The period of timeduring which a program isexecuting.exponent: In scientific notation,the number that denotes the powerof ten to which a number is raised.Otherwise, the number thatindicates the power to whichanother number is raised.expression: Any representation ofa value. This can be a singleidentifier, such as a constant orvariable, or a more complex formthat includes operators and severaloperands.external device: A device such asa keyboard, disk drive, or printer,that supplies or receives data to orfrom a computer. See device.external file: A character device, ablock-structured device, or a nameddisk file.factor: A part of a term.field: One discrete variable within arecord.V-8Glossary