Everything in our life became digital, starting from work that we are all using computers with different types, and our social network it becomes online as well, so to do more work we should have a big ram, a huge hard drive, software and some different additions like keyboard or mouse. If you are going to buy a computer soon, you have to know different types of computers and its components starting from the essential physical parts such as hard drives and storage, keyboards, mouse, parts that are customized with your needs such as ram and also the way that you will use connecting to the internet if you will use router or mobile adapters.