
Glossary - 3
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 maximum distances at which a scanner can read a symbol with a
certain minimum element width.
Device Configuration Package. The Symbol Device Configuration Package provides the Product Reference Guide
(PRG), flash partitions, Terminal Configuration Manager (TCM) and the associated TCM scripts. With this package
hex images that represent flash partitions can be created and downloaded to the wearable terminal.
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.
E
EAN. European Article Number. This European/International version of the UPC provides its own coding format and
symbology standards. Element dimensions are specified metrically. EAN is used primarily in retail.
ENQ (RS-232). ENQ software handshaking is also supported for the data sent to the host.
ESD. Electro-Static Discharge
F
Flash Disk. An additional megabyte of non-volatile memory for storing application and configuration files.
Flash Memory. Flash memory is nonvolatile, semi-permanent storage that can be electronically erased in the circuit
and reprogrammed. Wearable terminals use Flash memory to store the operating system (ROM-DOS), the terminal
emulators, and the Citrix ICA Client for DOS.
File Transfer Protocol (FTP). A TCP/IP application protocol governing file transfer via network or telephone lines. See
TCP/IP.
FTP. See File Transfer Protocol.
Flash Memory. Flash memory is responsible for storing the system firmware and is non-volatile. If the system power is
interrupted the data is not be lost.
H
Hard Reset. See Cold Boot.
Hz. Hertz; A unit of frequency equal to one cycle per second.
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