Disk drive It's a machine that reads data from and writes data onto a
disk.
A hard disk drive reads and writes hard disks.
A floppy drive accesses floppy disks.
Disk drives can be either internal (housed within a computer)
or external (housed in a separate box that connects to the
computer).
Download To copy data (usually an entire file) from a main source to a
peripheral device. The term is often used to describe the
process of copying a file from an online service to one's own
computer. Downloading can also refer to copying a file from
a network file server to a computer on the network.
E-mail Electronic mail. A service that sends messages on computers
via local or global networks.
Events An action or occurrence detected by a program. Events can
be user actions, such as clicking a mouse button or pressing
a key, or system occurrences, such as running out of
memory.
False positive Occurs when a scanner identifies a file as infected when in
fact it is not.
Filename extension The portion of a filename, following the final point, which
indicates the kind of data stored in the file.
:call CVScommit() Many operating systems use filename
extensions, e.g. Unix, VMS, and MS-DOS. They are usually
from one to three letters (some sad old OSes support no
more than three). Examples include "c" for C source code,
"ps" for PostScript, "txt" for arbitrary text.
Heuristic A rule-based method of identifying new viruses. This method
of scanning does not rely on specific virus signatures. The
advantage of the heuristic scan is that it is not fooled by a
new variant of an existing virus. However, it might occasion-
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