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Input/Output Devices
Ways of feeding data into a computer and /or getting it out.
Program Counter
Register which contains the instructions for the next task to be performed.
Data Bus
Instructions are sent to the Processor (through ________) to be decoded.
Processor
________ sends the decoded instructions as control signals using the Control Bus, to other components of the system, so that the instructions can be executed.
Memory Unit
The unit which contains all the data to be processed and its addresses as well.
Buffers
________ are filled from computer memory and emptied to the hardware, allowing the processor to perform other tasks in the meanwhile.
Registers
High speed storage areas within the computer system, which are needed to store and manipulate data.
Interrupt
A(n) ________ is sent when for example, a page is jammed in the printer, or when a software error occurs.
Arithmetic Logic Unit
Register which allows the calculations and logic operations to be performed within the computer.
Von Neumann System
A computer system which can store programs in a memory.
Interrupt
It is a signal sent to the Processor from a device or software, to make the Processor temporarily stop its current operation and service another.
Processor
The unit where data is processed and the necassary logic operations are carried out.
Buffer
It is a temporary memory area.
Interrupts
________ allow computers to multitask.
Operating System(OS)
It is a computer software running in the background when the computer is on, and performs various operations
Buses
The connections which transport data around the system and also maintain data synchronization
Address Bus
Unidirectional Bus carrying signal related to the addresses of the memory contents
Data Bus
Bidirectional Bus responsible for moving the data and contents of the memory around the system
Control Bus
Unidirectional Bus carrying signals related to control and coordination of all activities in the computer
Memory Address Register(MAR)
Address which contains the location of the memory contents
Memory Data Register(MDR)
Register which contains the content from memory
Arithmetic Logic Unit(ALU)
Register which allows the calculations and logic operations to be performed within the computer
Program Counter(PC)
Register which contains the instructions for the next task to be performed
Current Instruction Register(CIR)
Register which contains the instructions for the current task
Memory Unit
It contains all the data to be processed and its addresses as well
Control Unit
It controls the operation of the memory, processor and input/output devices
Input/Output Devices
Ways of feeding data into a computer and/or getting it out
Note 
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