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Term
bps
Bits/second. It is the measurement unit of data transmission rate.
Bps
Bytes/second. It is the measurement unit of data transmission rate.
CD-R
It is a type of CD that can record data. But the data can be recorded only once in the CD-R.
The data cannot be deleted or overwritten.
CD-RW
It is a kind of rewritable CD. The data can be written to CD-RW and then deleted or overwritten
(rewritten).
GB
It is the measurement unit of the data or drive storage space. 1 GB is equal to 1024 MB
(1,073,741,824 bytes).
GHz
It is the measurement unit of frequency (1 GHz is equal to 1 billion Hz or 1000 MHz).
Hz
Hertz. It is the measurement unit of frequency (1 Hz is equal to one cycle persecond).
Computer and electronic equipment usually takes kHz, MHz and GHz as measurement units.
I/O
Input/Output. It is the operation or device used to input the data to or extract the data from
computer. For example, the keyboard is an input device while the printer is an output device.
Kb
Kilobyte. It is the measurement unit of data (1 Kb is equal to 1024 bits). It is also the
measurement unit of integrated circuit memory space. Refer to KB.
KB
Kilobyte. It is the measurement unit of data (1 KB is equal to 1,024 bytes). 1024 KB is equal to
1 MB.
KHz
Kilohertz. It is the measurement unit of frequency (1 KHz is equal to 1,000 Hz).
Mb
Megabit. It is the measurement unit of memory chip capacity (1 Mb is equal to 1024 Kb).
MB
Megabyte. It is the measurement unit of data (1 MB is equal to 1,048,576 bytes). 1MB is equal
to 1024 KB. When referred to hard disk drive storage, this term is usually rounded off to 1M
bytes.
MBps
Megabits per second. It is a unit of measurement for data transmission, equivalent to
1,048,576 bits per second.
WOL
Wake on LAN. This technology can be used to remotely turn on the computer in the network
or wake it up from the hibernation mode. WOL is an aspect of WfM technology.
TCP/IP
It is the abbreviation for the Transmission Control Protocol (TCP)/Internet Protocol (IP) and is
basic communication protocol for Internet as well as private network. TCP/IP is a two-layer
system. As the higher layer, TCP wraps the files into smaller packages which will be
transmitted from one computer via Internet and received by the TCP layer of another
computer. The TCP layer of the receiving computer then restores information within the
package. As the lower layer, IP determines the address for each package to ensure it arrives at
appropriate destination.
IP Address
Each computer on the Internet has at least one IP address which is used as its unique ID to
distinguish it from all other computers on the Internet. When the data is sent or received on the
Internet, sender or receiver address is included in the data.
CMOS
It is the Complementary Metal-Oxide-Semiconductor and the storage chips commonly used in
NVRAM storage
COM Port
It usually refers to the serial port connection with Modem or other serial devices. Most
computers support one or two serial ports specified as COM1 and COM2.
L1 Cache
It is the Level 1 Cache, namely the small, main cache stored in microprocessor. It's faster than
L2 Cache.
L2 Cache
It is the Level 2 Cache, namely the secondary cache with larger capacity and lower speed that
is used together with L1 Cache. In early microprocessors, L2 Cache is usually located outside
of processor and installed on chips or add-in cards. L2 Cache is normally integrated in the
processor in latest processors.
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ThinkCentre M740s / M940s User Manual V2.0 (E-version)
Definition
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