Appendix A
Glossary (Cont.)
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
CLASS 2 & CLASS 3A: Class 2 and Class 3A lasers emit visible,
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 eye wear during any operation of the laser. Class 3B lasers have both admin- istrative 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
PCI Bus (Peripheral Component Interconnect Local Bus)
PCI bus is a specification that defines a
POST (Power On Self Test)
When you turn on the computer, it will first run through the POST, a series of