Glossary - 3

Code Length. Number of data characte rs in a ba r cod e bet w ee n the start and stop characters, not including those
characters.
Cold Boot. A cold boot restarts the mobile computer and er ases all user stored records and entries.
COM Port. Communication port; ports are identified by number, e.g., COM1, COM2.
Continuous Code. A bar code or symbol in which all spaces within the symbol are parts of ch aracters. There are no
intercharac te r ga ps in a cont inu ou s co de . Th e ab se nce of gaps allows for greater information den sity.
Cradle. A cradle is used for charging the terminal battery and for communicating with a host computer , and provides a
storage place for the terminal when not in use.

D

Dead Zone. An area within a scanner's field of view, in which specular reflection may prevent a successful de code.
Decode. To recognize a bar code symbology (e.g., UPC/EAN) and then analyze the content of the specific bar code
scanned.
Decode Algorithm. A decoding scheme that converts pulse widths into data representation of the letters or numbers
encoded within a bar code symbol.
Decryption. Decryption is the decoding and unscrambling of received encrypted data. Also see, Encryption and Key.
Depth of Field. The range between minimum and m aximum distances at which a scanner can read a symbol with a certain
minimum elem en t w idt h.
Discrete 2 of 5. A binary bar code symbology representing each character by a group of five bars, two of which are wide.
The location of wide bars in the group determines which character is encoded; spaces are insignificant. Only numeric
characters (0 to 9) and START/STOP characters may be encoded.
Discrete Code. A bar code or symbol in which the spaces between characters (intercharacter gaps) are not part of the code.
DRAM. Dynamic random access memory.

E

EAN. European Article Nu mb e r. Th is Eur o pean /International v ersio n of th e UPC pr ovides its own coding forma t an d
symbology standards. Element dimensions are specified metrically. EAN is used primarily in retail.
Element. Generic term for a bar or space.
Encoded Area. Total linear dimension occupied by all characters of a code pattern, including start/stop characters and data.
ENQ (RS-232). ENQ software handshaking is also suppo rted for the data sent to the host.
ESD. Electro-Static Discharge