The first chapter is an overview of computers and logic. In this post I will be covering the overview of computers and in the next post in the chapter 1 series I will go over the logic part. (I know that some of the topics in this post are really basic, and some many think " if you don't know this stuff by now, there in no hope for you. But I have just decided to cover the majors topics of my class regardless of the simplicity topic)
There are major parts of any computer system:
- Hardware: equipment or devices
- Software: programs that have instructions for the computer
There are four major operations in a computer:
- Input
- Processing
- Output
- Storage
Input devices are things like a keyboard or mouse, the tools that allow you enter data into the computer.
Processing is where the data is worked on; the data can be organized, validated, used to make calculations or any number of tasks.
Output devices are things like printers, monitors and speakers, so you can 'see' the data.
Storage, there are two storage categories: internal and external. Internal storage is located inside the computer, this would be main memory and random access memory (RAM). This memory is lost when you turn off the power to the computer. External storage is generally located outside the computer, these types of storage are hard drives and flash drives. The data on external storage devices are relatively permanent, if power is lost the data remains; in order to remove the data it has to be done manually.
The next post will cover the steps involved in the programming process.