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M-N

machine language
the language, made up of binary-coded instructions, that is used directly by the computer
mainframe
a large computing system designed for high-volume processing or for use by many people at once
maintenance
the modification of a program, after it has been completed, in order to meet changing requirements or to take care of any errors that show up
maintenance phase
period during which maintenance occurs
mantissa
with respect to floating point representation of real numbers, the digits representing a number itself and not its exponent
member selector
the expression used to access components of a struct or class variable; it is formed by using the variable name and the member name, separated by a dot (period)
memory leak
the loss of available memory space that occurs when memory is allocated dynamically but never deallocated
memory unit
internal data storage in a computer
metalanguage
a language that is used to write the syntax rules for another language
method
a function declared as a member of a class object
metric based testing
testing based on measurable factors
microcomputer

See personal computer (PC).

minicomputer
a computer system larger than a personal computer but smaller than a mainframe; sometimes called an entry-level mainframe
mixed mode expression
an expression that contains operands of different data types
modular programming

See top-down design.

modularity (in OOD)
meaningful packaging of objects
module
a self-contained collection of steps that solves a problem or subproblem; can contain both concrete and abstract steps
module nesting chart
a chart that depicts the nesting structure of modules and shows calls among them
name precedence
the priority treatment accorded a local identifier in a block over a global identifier with the same spelling in any references that the block makes to that identifier
named constant
a location in memory, referenced by an identifier, where a data value that cannot be changed is stored
named matching

See implicit matching.

named type
a type that has an identifier (a name) associated with it
nested control structure
a program structure consisting of one control statement (selection, iteration, or subprogram) embedded within another control statement
nested if
an if statement that is nested within another if statement
nested loop
a loop that is within another loop
new
a C++ operator that returns the address of new space allocated for a dynamic variable
nodes
the building blocks of dynamic structures, each made up of a component (the data) and a pointer (the link) to the next node
nonlocal
a descriptive term applied to any identifier declared outside of a given block
nonlocal access
access to any identifier declared outside of its own block
null statement
an empty statement
nybble
four bits; half of a byte


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