Glossary - 3
Depth of Field. The range between minimum and maximum distances at which a scanner can read a symbol with a
certain minimum element width.
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.
EMDK. Enterprise Mobility Developer’s Kit.
ESD. Electro-Static Discharge
F
File Transfer Protocol (FTP). A TCP/IP application protocol governing file transfer via network or telephone lines. See
TCP/IP.
Flash Memory. Flash memory is nonvolatile, semi-permanent storage that can be electronically erased in the circuit
and reprogrammed.
G
GPS (Global Positioning System). A satellite-based navigation system made up of a network of 24 satellites. GPS
satellites circle the earth and transmit signal information to earth. GPS receivers take this information and use
triangulation to calculate the user's exact location.
H
Hard Reset. See Cold Boot.
Hz. Hertz; A unit of frequency equal to one cycle per second.
Host Computer. A computer that serves other terminals in a network, providing such services as computation,
database access, supervisory programs and network control.
High-Speed Downlink Packet Access (HSDPA). A 3G (third generation) mobile telephony communications protocol
in the High-Speed Packet Access (HSPA) family, which allows networks based on Universal Mobile
Telecommunications System (UMTS) to have higher data transfer speeds and capacity.
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