Transcript extremely fast memory

As you approach year 12, it is
VITAL that you understand the
concepts of ICT that you have
studied in Units 1, 2 and 3…
Can you answer the following
Questions?
• Random Access
Memory.
• Volatile / Temporary
(data lost when
electricity is switched
off).
• Stores programs and
data currently being
used.
• Read Only Memory.
• Non-Volatile /
Permanent (data is not
lost when electricity is
switched off).
• Stores BIOS – the
program that loads the
OS from the HD to the
RAM.
Cache memory is extremely fast memory that is built into a
computer’s central processing unit (CPU), or located next to it on a
separate chip. The CPU uses memory to store instructions that
are repeatedly required to run programs, improving overall
system speed.
An OS is a set of programs that controls how the
hardware of a computer works… It is the means of
communication between the user and the computer
Controls the
Input and
Output of the
Computer.
Stores and
Retrieves Files
(files being
opened and
saved)
Manages the
data being
processed.
Central Processing Unit
Arithmetic and Logic Unit
MegaByte
Microphone – To Input Sound into the Computer.
Scanner – To Input a hardcopy of a graphic into a
computer.
Mouse – To make a selection or choice from the
Operating System or Application Program.
Digital Camera – To take clear photos which can
be automatically entered into a computer.
Dot Matrix – Cheaper to buy and run compared
to other printers.
Ink Jet Printer – Quieter to print than a dotmatrix.
Laser Printer – Prints more pages per minute
than the Ink Jet Printer.
American Standard Code Information Interchange
Visual Display Unit
Digital Versatile Disk
Characters Per Second
Pages Per Minute
Dots Per Inch
Write Once Read Many
700-800 MB
1.44MB
4.7 GB
100MB
Graphical User Interface
Windows
Icons
Menus
Pointers