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Programming Basics 3

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Operating System
a set of programs that run your computer
Graphic User Interface : allows a user to itneract with the computer via icons
a finite sequence of instructions, a self-contained step-by-step set of operations to be performed that allows to solve a program or complete a task
Random Access Memory - primary memory. All data must be in RAM to be used by the machine, it is volatile.
Secondary Memory
External, Permanent, holds large amounts of data (flash drive, floppy disk)
Central Processing Unit: Does the calculations, logical decisions and directs the computer
2 Parts of the Central Processing Unit
Arithmetic Logic Unit (ALU) and the Control Unit
Arithmetic Logic Unit
arithmetic and logical operations
Control Unit
Takes instructions,decodes and executes them and sends the instructions where it needs to go
A low level form like mechanical language