Cai Kun;Cai Kun (T'sai Lun, c. 105 AD), Chinese inventor
Cartwright;Cartwright, Edmund (1743-1823), British clergyman and inventor
Cathode;A cathode is a negatively charged electrode from which electrons emerge.
Cayley;Cayley, Juan de la (Cierva y Codorniu, 1895-1935), Spanish engineer
Central processing unit;The central processing unit, also known as a CPU or microprocessor, is the core of any computer, as it controls all other components. It is composed above all of a processing unit, primary cache and control unit.
CFC;CFC is the abbreviation for chlorofluorocarbons. It may be gases or liquids, employed as refrigerants in air-conditioning systems or refrigerators or as propellants in spray cans.
Chebyshov;Chebyshov, Pafnuti LÆvovich: 1821 to 1841, mathematician
Cherenkov;Cherenkov, Pavel Alekseyevich: 1904 to 1990, physicist
Chips;A chip is a very tiny wafer, usually made of silicon, on which a minuscule electronic circuit is placed.
Clipart;Collection of drawings, photos, charts, that may be either used freely or may be inserted in other documents with copyright protection.
Clipper;A clipper is a very fast sailing ship that was mainly built in the 19th century in Britain and North America. It had three or four tall masts and a large sail area.
Cockerell;Cockerell, Christopher (1910 - 1999), British engineer
Colors of the spectrum;The colors of the spectrum are the hues we see when light is refracted. White light is split into its constituents and spreads out into a series of colors.
Compass;A device used for finding directions.
Compatible;Compatible means able to be used with something. Compatible may refer for example to two computers, if they can run the same programs and use the same data.
Compound;Substance that forms in the chemical bonding of at least two elements. Hydrogen and oxygen combine to form water.
Compressor;A compressor is a machine that compresses chemical gases or air into a small volume and thus subjects them to higher tension.
Condenser;A condenser may either be a device for compressing gases or vapors into liquids, as in refrigerators, or another term for a capacitor, i.e. a component used to store charges in an electric circuit.
Controls;A control or regulator is a component used to control variables in a device such as volume, frequency or temperature.
Cooke;Cooke, William Fothergill Anton (1806-1879), British electrical engineer
Co-ordinates;Numbers that define the location of a point on a surface or in a space.
Copernicus;Copernicus, Nicolaus (real name Mikolaj Kopernik): 1473 to 1543, canon, physician and astronomer
Cugnot;Paul Corn·, a French bicycle dealer, went down in aviation history, as he succeeded on 13th November 1907 to keep a flying machine with twin rotors airborne for 30 seconds 30cm above the ground.
Cursor;A cursor is a position marker or blinking symbol on a computer monitor. It displays where the next input will appear. A cursor can be moved to all points on the screen with directional keys, a mouse or other pointing device.
Cylinder;A cylinder is a tube-shaped hollow object with flat walls and also refers to a mechanical component, in which a piston slides in and out.
D2-MAC System;The D2-MAC-System (duobinary encoded Multiplex Analog Components) was proposed as the new universal European television standard. It served to optimize the compatibility of channels broadcast directly from or to satellites, so that users could receive video and audio signals from neighboring countries that used the SECAM system (France) instead of the PAL system.
Daguerre;Daguerre, Louis Jacques MandΘ (1787-1851), French photographer and painter
Daguerrotype;A daguerrotype is the first widespread form of photography. Louis Jacques MandΘ Daguerre developed this process, in which a latent silver iodine image was made visible by mercury vapors and was fixed with a sodium thiosulfate solution.
Daimler;Daimler, Gottlieb Wilhelm (1834-1900), German engineer and inventor
Daisywheel printer;Daisywheel printers are equipped with a type wheel.
Database;A database is a large collection of data, which are sorted by specific criteria, so that information can be easily retrieved.
Davy;Davy, Humphry (1778-1829), British chemist and physicist
Demodulate;Demodulate means rectify. A demodulator is a device used for instance to recover Information such as music or speech from radio waves.
Density;Measurement of mass in a given space. Density describes the relationship between mass and volume in physical terms.
Dieckmann;Dieckmann, Max (1882-1960), German physicist
Diesel;Diesel, Rudolf Christian Carl (1858-1913), German engine designer
Digital;The adjective digital refers to the method of representing data or information in digits. Digital data is represented as steps and not as continuous variations as in analog data.
Digital to analog converter;A digital to analog converter is an electronic circuit that transforms digital input signals in analog output signals.
Digitalize;Digitizing is the conversion of data and information available as electric analog signals into digital signals.
Dioptric;Dioptric means "refracting light" or "transparent".
Displacement;The displacement or engine volume is the volume that the pistons of an engine displace between the ends of their up- and downstrokes. In internal combustion engines the displacement of all cylinders is usually specified in cubic centimeters or cc.
Drais;Drais. Carl-Friedrich (1785-1851)
Drebbel;Drebbel, Cornelius J. van (1572-1634), Dutch engineer
DVD-Plus;DVD-Plus refers to a DVD standard, in which one half contains a DVD layer and the other half a CD layer.
DVD-RAM;DVD-RAM discs are rewritable storage discs, already commercially available, with a capacity of 2.6 gigabytes per side, namely 5.2 gigabytes on a double-sided rewritable DVD.
DVD-ROM;A DVD-ROM disc is a read-only, namely unrecordable storage medium with a capacity between 4.7 and 17 gigabytes.
