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JANUS? 2020 Hand-Held Computer (4MB) - Intermec

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<strong>JANUS</strong> <strong>2020</strong> <strong>Hand</strong>-<strong>Held</strong> <strong>Computer</strong> User’s Manual (<strong>4MB</strong>)<br />

G-10<br />

DLE<br />

The ASCII Data Link Exception character. It causes the character that follows it<br />

to be received as data, even if it is a protocol character. It allows for the use of<br />

control characters in preambles, data strings, and configuration command<br />

strings.<br />

DOS code pages<br />

A code page is a table that relates binary character codes used by a program to<br />

keys on the keypad or to characters on the display. All international keypads<br />

are translated using an installed DOS code page that contains the standard<br />

ASCII character set and a set of national language characters specific to the<br />

language the code page supports.<br />

downline<br />

When devices are connected to a computer, they are connected in a “line.”<br />

Downline is a direction relative to the computer. If more than one computer is<br />

connected in a line, the upline computers usually handle data processing and<br />

the downline computers usually handle data collection and sometimes some<br />

data preprocessing. Contrast with upline.<br />

DRAM<br />

Abbreviation for dynamic random access memory. A type of RAM that stores<br />

information in integrated circuits containing capacitors. Since capacitors lose<br />

their charge over time, DRAM boards include logic to recharge, or “refresh,”<br />

the RAM chips continuously. Since their internal circuitry is simple, DRAMs<br />

are more commonly used than static RAMs, even though they are slower.<br />

DRAM can hold approximately four times as much data as a static RAM chip<br />

of the same complexity. The reader has <strong>4MB</strong> of battery-backed DRAM.<br />

drive<br />

An electromechanical device that reads from and writes to disks. The three<br />

types of common disk drives are floppy disk drives, hard disk drives, and PC<br />

card drives.<br />

driver<br />

See device driver.<br />

EAN<br />

European Article Numbering. International standard bar code for retail food<br />

packages corresponding to the Universal Product Code (UPC) in the United<br />

States. A reader that is configured to decode EAN bar codes can decode UPC,<br />

but the reverse is not true. UPC code is a subset of EAN code.

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