1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
<!-- $Progeny$ -->
<!--
Copyright 2002 Progeny Linux Systems, Inc.
Copyright 2002 Hewlett-Packard Company
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
-->
<itemizedlist>
<listitem>
<para><literal>audio</literal></para>
<para>A device capable of producing an analog or digital
sound signal is an <firstterm>audio</firstterm> device.
Typically, any device commonly referred to as a
<quote>sound card</quote> is classified by &discover; as
an audio device.</para>
</listitem>
<listitem>
<para><literal>bridge</literal></para>
<para>A device that provides access to devices of a
different type, commonly on a different bus, is a
<firstterm>bridge</firstterm> device. For instance, consumer
&pci; chipsets often feature a bridge to &ata; (also
known as IDE) devices.</para>
</listitem>
<listitem>
<para><literal>broadband</literal></para>
<para>An interface device to a computer communications
network implemented on top of a technology not explicitly
designed for that purpose is a <firstterm>broadband</firstterm>
device. Examples include ISDN terminal adapters as well
as DSL and cable <quote>modems</quote>; analog
phone-line modems are not included in this classification
(see <quote>modem</quote> below).</para>
</listitem>
<listitem>
<para><literal>display</literal></para>
<para>A device controlled by the host machine's CPU and
capable of producing an analog or digital video signal
for output purposes is a <firstterm>display</firstterm> device.
Typically, any device commonly referred to as a
<quote>video card</quote> is classified by &discover; as
a display device.</para>
</listitem>
<listitem>
<para><literal>fixeddisk</literal></para>
<para>A high-speed, fixed magnetic storage device such as
a hard disk drive is a <firstterm>fixeddisk</firstterm> device.
Removable media devices such as floppy disk drives,
CD-ROM drives, magneto-optical devices, tape drives, and
Compact Flash card readers are not included in this
classification.</para>
</listitem>
<listitem>
<para><literal>humaninput</literal></para>
<para>A device that receives tactile input from a person
for the purpose of directing a computer's activity is a
<firstterm>humaninput</firstterm> device. Examples include
keyboards, mice, trackballs, joysticks, gamepads, digital
tablets manipulated with a stylus or finger, and so
forth. Input devices that rely upon non-tactile means of
determining a person's intent, such as speech-recognition
devices or cameras, are not included in this
classification.</para>
</listitem>
<listitem>
<para><literal>imaging</literal></para>
<para>A device that captures still images for input
purposes is an <firstterm>imaging</firstterm> device. Scanners
and digital cameras are examples of imaging
devices. Motion-capture devices such as television tuner
cards, webcams, and digital video cameras are not
included in this classification.</para>
</listitem>
<listitem>
<para><literal>miscellaneous</literal></para>
<para>Any device that cannot logically be classified as
another device type is a <firstterm>miscellaneous</firstterm>
device.</para>
</listitem>
<listitem>
<para><literal>modem</literal></para>
<para>An analog phone-line modulator/demodulator
(modem) is classified by &discover; as a
<firstterm>modem</firstterm> device. No other kind of device is
so classified.</para>
</listitem>
<listitem>
<para><literal>network</literal></para>
<para>An interface device to a conventional computer
data communications network that does not require the use of a terminal
adapter is a <firstterm>network</firstterm> device. For example,
Ethernet and Token Ring network interface cards are network
devices. Analog phone-line modems; terminal adapters
for technologies such as ISDN and DSL; and <quote>cable modems</quote>
are not <quote>network</quote> devices.</para>
</listitem>
<listitem>
<para><literal>optical</literal></para>
<para>An optical-technology storage device, often using
read-only media, is an <firstterm>optical</firstterm> device. By
far the most common examples of these devices are CD-ROM
and DVD-ROM drives, including versions of these drives
that can <quote>burn</quote> (write to) optical
discs.</para>
</listitem>
<listitem>
<para><literal>printer</literal></para>
<para>A device that renders visual output in a permanent
or semi-permanent manner to a physical medium is a
<firstterm>printer</firstterm>. Typically, any device
colloquially referred to as a <quote>printer</quote> is
also classified by &discover; as a
printer.</para>
</listitem>
<listitem>
<para><literal>removabledisk</literal></para>
<para>Storage devices that feature removable media using
just about any technology except that of magnetic tape,
CD-ROM, and DVD-ROM drives are
<firstterm>removabledisk</firstterm> devices. Examples include
floppy disk drives, magneto-optical drives, and Compact
Flash card readers.</para>
</listitem>
<listitem>
<para><literal>tape</literal></para>
<para>A sequential-access mass storage device using
magnetic tape is a <firstterm>tape</firstterm> device. Commonly
used for archival and backup purposes, DAT drives are
examples of tape devices.</para>
</listitem>
<listitem>
<para><literal>video</literal></para>
<para>A device that produces a real-time digital video
signal for input purposes is a <firstterm>video</firstterm>
device. Webcams, digital video cameras, and television
tuners are examples of video
devices. Note that still digital cameras with
<quote>movie</quote> capability are
<emphasis>not</emphasis> considered video
devices unless they can transmit the live video signal to
the host in real time.</para>
</listitem>
</itemizedlist>
|
