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ASUS A5E Manual

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Appendix A
Kensington
®
Locks
Kensington
®
locks (or compatible) allow the Notebook PC to be secured usually using a metal cable
and lock that prevent the Notebook PC to be removed from a fixed object. Some security products may
also include a motion detector to sound an alarm when moved.
Laser Classifications
As lasers became more numerous and more widely used, the need to warn users of laser hazards became
apparent. To meet this need, laser classifications were established. Current classification levels vary from
optically safe, requiring no controls (Class 1) to very hazardous, requiring strict controls (Class 4).
CLASS 1: A Class 1 laser or laser system emits levels of optical energy that are eye-safe and conse-
quently require no controls. An example of this class of laser system is the checkout scanning device
found in most grocery stores or lasers used in optical drives.
CLASS 2 & CLASS 3A: Class 2 and Class 3A lasers emit visible, continuous-wave (CW) optical
radiation levels slightly above the maximum permissible exposure (MPE) level. Although these lasers
can cause eye damage, their brightness usually causes observers to look away or blink before eye
damage occurs. These lasers have strict administrative controls requiring placement of signs warning
personnel not to stare directly into the beam. Class 3A lasers must not be viewed with optically-aided
devices.
CLASS 3B: Class 3B lasers, and Class 3A lasers with outputs of 2.5mW, are hazardous to personnel
who are within the beam path and look at the beam source directly or by specular reflection. These
lasers cannot produce hazardous diffuse reflections. Personnel working with these lasers should wear
appropriate protective eyewear during any operation of the laser. Class 3B lasers have both adminis-
trative and physical controls to protect personnel. Physical controls include limited access work areas.
Administrative controls include special warning signs posted outside the entrances to the laser work
spaces and lights outside the entrances that warn personnel when the lasers are in use.
CLASS 4: Class 4 lasers are high-power lasers that will cause damage to unprotected eyes and skin
through intra-beam viewing and specular or diffuse reflections. Consequently, no personnel should be
in aroom where a Class 4 laser is operating without proper eye protection.
PCI Bus (Peripheral Component Interconnect Local Bus)
PCI bus is a specification that defines a 32-bit data bus interface. PCI is a standard widely used by
expansion card manufacturers.
PC Cards (PCMCIA)
PC cards are about the size of a few stacked credit cards and have a 68-pin connector at one end. The
PC Card standard accommodates a number of function, communication, and data storage expansion
options. PC cards come in memory/flash cards, fax/modems, networking adapters, SCSI adapters, MPEG
I/II decoder cards, and even wireless modem or LAN cards. The Notebook PC supports PCMCIA 2.1,
and 32bit CardBus standards. The three different PC Card standards actually have different thicknesses.
Type I cards are 3.3mm, Type II cards are 5mm, and Type III cards are 10.5mm thick. Type I and Type
II cards can be used in a single socket. Type III cards take up two sockets and must be used on Notebook
PCs with two sockets.
… 59 …


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