null character
A character that has all its bits set to 0. A null character, therefore, has a numeric value of 0, but it has a special meaning when interpreted as text. In some programming languages, notably C, a null character is used to mark the end of a character string. In database and spreadsheet applications, null characters are often used as padding and are displayed as spaces.
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)(n.) An extremely lightweight personal computer. Notebook computers typically weigh less than 6 pounds and are small enough to fit easily in a briefcase. Aside from size and portability, the principal difference between a notebook computer and a personal computer is the display screen. Notebook computers use a variety of techniques, known as flat-panel technologies,to […]
- null-modem cable
A specially designed cable that allows a user to connect two computers directly to each other via their communications ports (RS-232 ports). Null modems are particularly useful with portable computers because they enable the portable computer to exchange data with a larger system. Null modem cables have the Tx (transmit) and Rx (Recieve) lines crossed […]
- nullable
In database management, a field that is allowed to have no values is called nullable. Depending on the application, nullable may also be called a null reference or null object.
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(1) A computer whose dominant characteristic is its ability to perform large amounts of numerical computations quickly. Supercomputers, for example, are sometimes called number crunchers. In addition, the term number cruncher is often applied to powerful workstations. (2) The term number cruncher is sometimes applied to programs. For example, statistical programs are number crunchers because […]
- numeric keypad
)A separate set of keys on some keyboards that contain the numbers 0 through 9 and a decimal point arranged as on an adding machine. Numeric keypads make it easier to enter large amounts of numeric data. Frequently, the keys on the numeric keyboard also serve as cursor control keys. Their meanings, therefore, depend on […]