Hardware and Operating Systems Vocabulary

Match the definition with the term - put the letter of your answer in the space provided next to the definition:

a.	ALU (arithmetic logic unit)	Software program the makes it possible for the computer hardware to communicate and work with the computer software.
b.	Bandwidth	A system of computers that interconnect.
c.	CPU (Central Processing Unit)	Board etched with a circuit and processors.
d.	DOS	Operating system in use.
e.	Platform	Lets a computer store data and programs temporarily
f.	Firewall	Responds to a set of instructions in a specified manner and can execute a set of instructions
g.	GUI (Graphical User Interface)	The number of bits that are processed in a single instruction.
h.	Subdirectory	Computer that is able to share it resources and data with other computers, called clients, on a network.
i.	Input device	Lets multiple users run software at the same time.
j.	Clock speed	Disk Operating System. Used in early PCs and still usable.
k.	Bus	Includes icons and graphics which allow the user to navigate using a mouse with possibly some keyboard interaction.
l.	Output device	Format and rules for transferring files from your computer to a remote computer.
m.	Network	How many instructions per second can be executed by the procssor. Given in megahertz (Hz)
n.	Cookie	Small area of data storage that a computer can use instantly to re-access data instead of going to the original source.
o.	Operating system	Text file that is sent by a web server and is stored on your hard drive to convey information about the user.
p.	Programmable machine	Silcon chip that contains a CPU. The heart of all personal computers and workstations.
q.	.Control Unit	Performs arithmetic and logical operations
r.	RAM (Random access memory)	Consists of parallel lines that allow data, addresses, instructions and other kinds of information to travel internally. The information travels as an electrical pulse which is represented as a binary bit.
s.	SCSI card (Small Computer System Interface) Pronounced scuzzy	Device such as a printer or screen that can receive information from the computer.
t.	Multi-user operating system	Device such as a mouse or keyboard that allows you to input information to the computer.
u.	Server	Brains of the computer where most calculations etc take place. It included the arithmetic logic unit and the control unit.
v.	Cache	Security software to protect a computer from problems especially from the Internet.
w.	FTP (File Transfer Protocol)	High-speed parallel interface used to connect a computer to devices through a controller.
x.	PC board (Printed Circuit board)	A directory within another directory.
y.	Microprocessor	Takes instructions from memory and decodes and executes them.