The symbol "&" for the word "and".

A device, usually electronic, for increasing the power level of a signal, which is usually an electrical voltage or current. It receives the signal at a low level and sends it out at a high level in identical or nearly identical form.

The form of modulation in which the amplitude of the carrier is varied in accordance with the instantaneous value of the modulating signal. In amplitude of na alternating current voltage (or current) contains information. Abbreviation: AM.

A computer which handles continuous varying quantities and solves problems by translating the varying quantities such as speed, temperature, length, etc., into analogous electrical quantities such as voltages and currents. See Digital computer.

In data communication systems, a continuous electrical signal that varies in direct correlation to a signal impressed on a transducer. The frequency or amplitude of the single may vary, for instance, in response to changes in phenomena or characteristics such as sound, light, heat, position of pressure, etc. Generally, voice transmission is in analogue form.

Method to find the nature and/or the amounts of ingredients in a substance.

A relief printing process used by artists to produce prints. The design to be printed is painted directly onto a zinc plate with asphalt varnish which acts as an acid resist. The non-printing area is etched away with dilute nitric acid.

Photographic lens corrected for astigmatism as well as other distortions. Process camera lenses are anastigmats.

Non-rotating metal bar in a rotary press, laid horizontally at 45 degree from the direction of the press. Used to turn the web when feeding from the side, or to by-pass the former in ribbon folding. Usually filled with air and perforated to reduce friction from web travel. Also called Turner bar, Turning bar。

Marks used in pairs for inclosing words or figures, Its use is quite similar to quotation marks but mainly for title of books.

To cut paper to special angles in order to avoid waste in the manufacture of enveloped.

Machine for cutting paper at an angle to the machine direction of the paper.

The largest angle of acceptance of a lens which is capable of producing an image of usable quality on the film.

In rotogravure printing press, the angle between the doctor blade and the engraved cylinder.

A unit of measurement of the length of light waves. It is equal to 1/10 of a millimicron.

The maximum circular area in the focal plane that yields a sharp image by a lens. The diameter of the circular area approximates the focal length of the lens which limits the size of a process camera.

An anhydrous alcohol, a water-free alcohol used in lithographic deep-etch platemaking to wash the plate before applying tie lacquer image base. Also called Alcohol wash.