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.

 http://webopedia.internet.com/TERM/d/digital.html

                    digital
 

Traditionally, digital means the use of numbers and the term comes from digit, or finger.
Today, digital is synonymous with computer.

 
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,
 they can be electronically manipulated, preserved and regenerated perfectly at high
speed. The millionth copy of a computer file is exactly the same as the original. While
 this continually drives the software industry crazy protecting its copyrights, it is
 nevertheless a major advantage of digital processing.
 http://www.techweb.com/encyclopedia/

digital audio

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/

digerati

 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-educated individuals.
http://www.techweb.com/encyclopedia/

digitize

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.

http://webopedia.internet.com/TERM/d/digitize.html

 

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

            A       0100 0001
            B       0100 0010
            C       0100 0011

            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

            Hard disk spaces is usually measured in gigabytes