Stands Dynamic Hypertext Mark-up Language. DHTML is an HTML extension
that allows web pages to react to the end users' input, such as displaying
a web page based on the type of browser or computer end users are
viewing a page with.
A directory (such as Yahoo, commonly mistaken for a search
engine)
depends on people for listings. The main difference between a search
engine and a directory is that a directory does not make use of a
spider or robot. One of the defining characteristics of a directory
is that it is usually divided into categories.
In order to display a full-color graphic image on a 256-color monitor,
computers must simulate the colors it cannot display. They do this
by dithering which is combining pixels from a 256-color palette into
patterns that approximate other colors. At a distance, the human
eye merges the pixels into a single color. Up close, the graphic
image will appear pixelated and speckled.
Stands for dots per inch. DPI specifies the resolution of an output
device, such as a printer or printing press machine. Print resolution
usually runs from 300-1200 dots per inch on a Laser Printer and 125-225
dots per inch for photographic images on a print brochure. (For information
on input device measurements see ppi.)
The application of two colors to provide richer tones than a monotone
(single-color image, usually grayscale) can provide. A good duotone
image can simulate a wider range of the color spectrum than two colors
used separately. Duotones also use a hue (color) to set the mood
for a photo in a more stunning way than a full-color image can.
