Secondary Storage

   


                                                             Secondary Storage


      Alternatively referred to as external memory and auxiliary storage, secondary storage is a storage medium that holds information until it is deleted or overwritten regardless if the computer has power. For example, a floppy disk drive and hard drive are both good examples of secondary storage devices. As can be seen by the below picture there are three different storage on a computer, although primary storage is accessed much faster than secondary storage because of the price and size limitations secondary storage is used with today's computers to store all your programs and your personal data.

Input & Output Devices

                                                                       Input and output devices

                 
                            Here are some input and output devices:
                                            
                             Keyboard
                             Mouse
                             Headphones
                             Printers
                             Ipad screens
                              
                            There are also some input and output device for specific needs, for example there                               is a brail keyboard for people who are blind. There is also a 3D printer for people
                             who would like to design products. I personally would love to have a 3D printer
                              because it would be awesome to be able to print anything you want! 

CPU's

1)The purpose of the Cpu is to control the movement of data and instructions and to fetch data and instructions from memory.

2)GHz stands for gigahertz, which means 1 billion cycles a second. So 2.2 GHz mean 2.2 billion cycles a second.

3)a duel-core processor means there are 2 CPUs.

4)   A CPU cache is a cache used by the central processing unit of a computer to reduce the average time to access memory. The cache is a smaller, faster memory which stores copies of the data from frequently used main memory locations.

5) things that affect the cpu.Frequency of the cpu, number of cores, speed of memory bus, word width, information architecture, size of local cache.

Binary

 
                                                                Binary


Binary only has two numbers 1 and 2. It also has logic gates there are and,or and not gates, you can combind them to make more complicated gates which will be used for programming. The not gate works by what ever number is the input the oppaset will be the output. For example if he input is 1 the output will be 0.