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• WINDOWS (developed by the software company Microsoft) is a paid operating system but can run on many types of machines.
• MACOS is free to use but only runs on Mac computers
• LINUX Is a free, open-source system, meaning that anyone can see all of the underlying code and change and modify it however they want to.
• VOLATILE MEMORY means that every time your device loses power, primary memory erases itself.
• NON VOLATILE MEMORY Secondary memory on the other hand, is non volatile and its data even if the computer is turned off (which is why we want our valuable operating system in secondary memory).
• HARD DRIVE is the slowest, least expensive type of computer memory and is considered secondary/non-volatile (as it retains its data when the computer is turned off).
• SOLID STATE DRIVES storage is the fastest non-volatile memory we currently have, though efforts are underway to develop even faster options. These are like magnetic hard drives in that they are non-volatile, but flash cells inside of special memory chips store data on SSDs rather than magnetizing metal to store data
• RANDOM ACCESS MEMORY is about a thousand times faster than an SSD but is volatile, so you can’t use it to store anything you’d want to access regularly or permanently