HP Compaq Presario,Presario 5000 User Manual page 212

A drive with three laser
CD-RW drive
powers that can write to a CD-RW, erase
the data, or read the data. A high-power
laser melts the crystalline recording layer.
It cools quickly, sets without forming
crystals, and absorbs the laser beam. Data
is written in pits that form as the
noncrystalline material shrinks. A
medium-power laser erases the data. It
melts the recording layer at a lower
temperature for a longer period of time. As
the phase-change material cools, crystals
form that reflect the laser beam. The
high-power laser can then overwrite the
crystalline material. A low-power laser,
which does not alter the state of the
recording layer, reads the data. A CD-RW
drive can read CD-ROMs, CD-Rs, and
CD-RWs. It can write to both CD-Rs and
CD-RWs.
CD Text An audio CD format in which up
to 5000 characters of CD information
(title, artist, and song titles) are written into
the Table of Contents of the CDs. The
information is displayed when the CD is
played back on CD Text-enabled players.
chat An Internet feature that allows you to
exchange typed messages with another
person (or group of people) in real time. A
message you type instantly displays on the
other person's computer.
click (left-click) To press and quickly
release the left mouse button to select an
item.
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close disc To "close" a recordable disc so
that no further data can be written to it.
This is done when the last session's lead-in
is written. The next writable address on the
CD is not recorded in the lead-in, so that
the CD-Recorder in subsequent attempts to
write has no way of knowing where to
begin writing. Note: It is not necessary to
close a CD to read it in a normal CD-ROM
drive.
close session When a session is closed,
information about its contents is written
into the Table of Contents of the CDs, and
a lead-in and lead-out are written to
prepare the CD for subsequent sessions.
coaster Popular term for a ruined
recordable CD, named after the round
object you rest your drinking glass on to
avoid marking the table.
Ctrl+Alt+Delete Pressing and holding
down the Ctrl key, then the Alt key, then
the Delete key, and then releasing all three
keys to close a program that is locked (not
responding). Note: Unsaved data is lost.
Use Ctrl+Alt+Delete a second time to
shut down and restart a computer that is
locked. Unsaved data is erased from
memory. When the computer restarts, it
displays an error message that Windows
was not properly shut down and it scans
the hard drive for errors. Before installing
new software, close all open programs.
Then use Ctrl+Alt+Delete to close all
programs, one by one, that run in the
background—except Windows Explorer
and Systray. These two programs are
needed for the installation. If you
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LOSSARY