digit - A single character in a numbering system. In decimal, digits are 0 through 9. In binary, digits are 0 and 1. Describes any system based on discontinuous data or events. Computers are digital machines because at their most basic level they can distinguish between just two values, 0 and 1, or off and on. There is no simple way to represent all the values in between, such as 0.25. All data that a computer processes must be encoded digitally, as a series of zeroes and ones. The opposite of digital is analog. A typical analog device is a clock in which the hands move continuously around the face. Such a clock is capable of indicating every possible time of day. In contrast, a digital clock is capable of representing only a finite number of times (every tenth of a second, for example). In general, humans experience the world analogically. Vision, for example, is an analog experience because we perceive infinitely smooth gradations of shapes and colors. Most analog events, however, can be simulated digitally. Photographs in newspapers, for instance, consist of an array of dots that are either black or white. From afar, the viewer does not see the dots (the digital form), but only lines and shading, which appear to be continuous. Although digital representations are approximations of analog events, they are useful because they are relatively easy to store and manipulate electronically. The trick is in converting from analog to digital, and back again.
This is the principle behind compact discs (CDs). The music itself exists in an analog form, as waves in the air, but these sounds are then translated into a digital form that is encoded onto the disk. When you play a compact disc, the CD player reads the digital data, translates it back into its original analog form, and sends it to the amplifier and eventually the speakers.
Internally, computers are digital because they consist of discrete units
called bits that are either on or off. But by combining many bits in complex
ways, computers simulate analog events. In one sense, this is what computer
science is all about.
Digital Means Original The 0s and 1s of digital data mean more than
than just on and off. They mean perfect copying. When information, music,
voice and video are turned into binary digital form,
Sound waves that have been digitized and stored in the computer. The most common digital audio formats are music CDs and Windows WAV files. Music CDs are played in CD players as well as CD-ROM readers. WAV files are stored in the computer or on CD-ROMs and played by a media player software application. Although also in digital form and stored in the computer, MIDI music is not considered digital audio. MIDI files contain a coded version of the musical score, not the actual sound. (http://www.techweb.com/encyclopedia/)
The "digital elite." People that are extremely knowledgeable about computers.
It often refers to the movers and shakers in the industry. Digerati is
the high-tech equivalent of "literati," which refers to scholars and highly
To translate into a digital form. For example, optical scanners digitize
images by translating them into bit maps. It is also possible to digitize
sound, video, and any type of movement. In all these cases, digitization
is performed by sampling at discrete intervals. To digitize sound, for
example, a device measures a sound wave's amplitude many times per second.
These numeric values can then be recorded digitally.
BITS AND BYTES
Bit stands for binary digit: 0 or 1
A byte is made up of 8 bits
It takes 1 byte to store one ASCII character
ASCII stands for the American Standard Code for Information Interchange
Below are the digital representations for the letters A, B and C:
A 0100 0001
K stands for kilo and = 1024 (2 to the tenth power)
M stands for mega. A MB, megabyte is about a million bytes (1024x1024)
G stands for giga. A GB, gigabyte is about a billion bytes (1024x1024x1024)
T stands for tera. A TB, terabyte is about a trillion!
RAM is usually measured in MB
Common formats for digital graphics files