A method of enhancing DVD discs to minimise the letterbox
Traditional method of transmitting television signals.
Anti-virus software is used to scan emails and files on
your computer and to detect and remove any viruses. It
also prevents them being passed to other files and computers
in emails and documents. The software can be bought from
most computer stores and should be kept up to date.
A free web server program. Apache is usually associated
with Unix/Linux, but is also available for Windows. A
web server is the high-powered computer that runs your
Behind the lens of a camera is a movable circular iris
which opens and closes much like the pupil of an eye to
control the amount of light falling on the CCD. This is
usually controlled by the light meter, although some of
the cameras have a Manual Mode. Altering the aperture
also changes the Depth of Field.
A small program, normally written in Java. Applets run
in a web browser and are downloaded automatically when
you visit a web page. They are used to provide calculators,
crosswords and other interactive features.
When an image is stored in your camera's memory it has
to be compressed to fit, usually in a JPEG File, and in
the process some information is inevitably lost. When
the image is uncompressed for viewing, noise creeps in
and appears as angular blocks in the image, which are
known as artefacts.
An Attachment is a file which is 'attached' and sent with
a standard text e-mail message. Often photographs or word
documents are attached to e-mails.