SENS Q-1 < 11 - 12 >
11. References
Audio Frequency
An audio frequency normally audible to humans. Although the audio frequencies may differ depending
on individuals and the volume and type of the sound, audio frequencies range roughly from 20 Hz to
20 kHz.
RTC (Real-Time Clock Generator)
An electronic circuit included on the main board and which maintains the time of day. It operates
even if the computer is turned off, as it operates on separate power. Since keeping the time of the
day is convenient, most computers nowadays adopt this circuit.
IMT-2000 (International Mobile Telecommunication-2000)
This is used in our country and it refers to FPLMTS (Future Public Land Mobile Telecommunication
Systems). The International Telecommunications Union Radio Communication Sector (ITU-R) has
standardized FPLMTS so that anyone can use various communication services (voice and data)
anywhere with a single terminal. Because the pronunciation of ‘FPLMTS’ is difficult, it was renamed
IMT-2000 in 1996.
ACPI (Advanced Configuration and Power Interface)
This is an open industry power management specification co-developed by Intel and Microsoft to
replace the APM (Advanced Power Management) specification. ACPI establishes industry-standard
interfaces for OS-directed configurations and power management on laptops, desktops and servers.
ACPI has been adopted by Windows 98 and Windows 2000. Since ACPI efficiently manages the
power consumption of the system and peripherals, it is especially useful for notebook computers.
Wafer
A round slice of silicon crystal used to create an IC. Micro-circuits such as transistors, resistors and
capacitors are constructed by diffusion (or other doping techniques, such as ion implantation) and the
deposition of various materials. The diameter of a wafer is approximately 5cm and the thinness is
0.25mm. In general, a few tens or hundreds of chips whose height and width are 5mm are
constructed on a wafer. An IC is created by slicing the chips on the wafer.
LED (Light Emitting Diode)
A diode that emits light when the current flows. It is used as an indicator in a PC or as a light
source in optical communications. It is generally made of potassium, arsenic and phosphorus.
Booting
This term derives from the phrase, ‘Wear boots and stand up’. This refers to the processes and
functions that a computer goes through when first starting up, ending with the proper loading of the
Operating System and preparing it for receiving commands.
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