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Network—Connection of computers with cables and software for constant, on-demand communication. With a network, several computers can use or control software installed on a central computer, or server, dedicated to one or a few functions. Network Manager—In digital signage a device used to control fl ow of content to screens in various locations. Newscasting—Sending news out over the Internet, either point-to-point, or with multicast for client computers to receive and display. Node—Connection point of line segments in an on-screen image. Also called a control point in some sign software. Nozzle—In inkjet printing, the electromagnetic device contained within a printhead that actually fi res the ink droplet. A single printhead may contain 300 to 1000 nozzles. In sandblasting, a nozzle is a device used to direct the grit to the surface to be worked. NTSC—(National Television Standards Committee) the color video and broadcasting standard used mainly in North America and Japan. NTSC screen resolution is 525 lines and its refresh rate is 60 Hz. Null-Modem—A cable used to connect the serial ports of two computers that are physically close together. The connection simulates a modem connection, but can usually run at a higher baud rate because there is no telephone line noise. O Off-Contact—A way of screen printing in which the screen is raised at least 1/8" above the substrate. The preferred method for printing non- absorbent substrates. Off-Gassing—A dye-sublimation term referring to the nature of sublimation inks to gradually vaporize and release gases into the atmosphere. This is a harmless process that occurs primarily when the image is placed under stress of heat and/or pressure such as when packed in a box or exposed to the sun. This is evidenced by the imprinting of one image onto the back of another substrate packed on top of it or by ghosting when a sublimated product is shipped in a plastic bag preventing the expelled sublimation gas from escaping into the air. Ogee—In computer graphics, a distortion of an image using an S-shaped curve as one baseline, giving an image a wave look. Ohm—In electrical power, the unit of measurement for resistance in an electrical current; derived from Ohm's Law, which essentially states that any two of the four basic electrical values can be used to calculate the other two electrical values. Oligomer—An ingredient in UV-curing inks; a resin with a low molecular weight. The specifi c oligomers used in free-radical UV-curing inkjet systems have relatively high viscosities, while those in cationic ink systems have a relatively low viscosity. On-Demand Color—An expression used when referring to any short-run color printing, whether done by inkjet, electrostatic, thermal transfer or direct-to-press process. Opacity—Measurement of resistance to light passing through a particular substrate. Opaque—Blocking the passage of radiant energy, especially light. Not allowing light to show through. Optical Resolution—The maximum physical, or "true", resolution of a device without the use of software. Open Channel Letter—A channel letter that has no face and in which the neon tubing is visible. Origin—In routing, the place marking the zero coordinate on the X, Y or Z axes. Used as a starting reference by plotters and routers for knife and tool paths. Ortho—In graphic design, zero degrees horizontal; a command included in several sign-design software packages to set an image to a "perfect" horizontal level. Out-of-Home Media Network—A form of electronic digital signage similar to a private television channel, run by a company, organization, and/or advertiser. (See also Location-Based Advertising and Location-Based Media.) Outernet—A term used to describe out-of-home electronic display networks. M SIGN & DIGITAL GRAPHICS Outgas—The characteristic of a solid or liquid to vaporize under heat. Occurs in some plastics and paints if they are not through drying resulting in adhesive failure to anything applied over them. Also describes the release of impurities in vacuum systems such as neon tubes during processing. Outline/Inline—In computer graphics, a closed- loop path that copies an original's shape, but is offset by a positive measurement outside the original (outline), or a negative measurement inside the original (inline). Overlap—Amount of material in a panel (or tile) that duplicates the previous panel, allowing for alignment when assembling and installing a large image. In printing, this refers to where inks lay over one another resulting in bleed. Overlay—A feature of most video cards that allows particularly smooth digital video playback without overloading the computer's CPU. Overprint—The placement of one color over another. In process printing, overprinting can be used to vary tones and shades. With spot color, overprinting is used to create new colors. Overprint White—Printing application in which white ink is used as a background for reverse- printed transparent stocks, such as back-lit images. White in this application should be somewhat translucent. Oxygen Inhibition—A limiting factor in free radical UV-curing inkjet systems. The presence of oxygen retards or terminates the curing process. Cationic UV curing inkjet systems are not affected by the presence of oxygen. P Page—In electronic digital signage, a page is what is shown on a screen in any given moment. In printing and plotting it is the production area of the printer or plotter. Also called a panel. Panel—In printing, the division of a job based on the production area of a printing device. If the job size exceeds the production area (width of the printer), it can be divided into panels manually, or using a RIP software program, and then individually printed. Also called tiling. GLOSSARY