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flash EPROM
A type of erasable programmable read-only memory
that can be erased and reprogrammed electronically
while installed in a PTC.
function key
A key on the PTC's keyboard that is defined by an
application to perform a specific task. When pressed,
a function key executes a certain function (for
example, ENTER, END, ON/OFF).
GND
Ground.
hardware
Equipment used in conjunction with programs or
data communication. Contrast with software.
host
A personal computer or mainframe that receives and
computer
processes data from PTCs.
Hz
Hertz. A unit expressing frequency in vibrations per
second.
interface
The connection between two devices, defined by
common physical characteristics, signal
characteristics, and signal meanings.
I/O port
Input/output port. The location on a PTC where
RS-232-compatible accessories are attached. Also, the
point through which the PTC sends and receives
transmission signals.
LAN
Local area network. A radio network that supports
data communication within a local area, such as
within a warehouse or building. Contrast with
laser scanner
A type of bar-code reader that uses a beam of laser
light.
LCD
Liquid crystal display. The PTC-870IM's standard
display screen is an LCD.
LED
Light-emitting diode.
mAhr
Milliampere hour(s). A measurement of the ability to
provide electrical power.
WAN.
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