Computer Hard drives
A touch screen is basically a thing that that lets you touch the screen with your finger's. There are touch screen watches,televisions,computers,laptops,phones and etc. You can swipe the screen with your fingers and zoom in. Touch screen was first invented by Steve Jobs in 2007 when he introduced iphone 3g.
Computer Hard Drives
Hardrives are very usefull because the more gaigabytes or tera byes you have, the better it is for your system to be very fast and easy. If your computer or pc is loaded with stuff then your computer or pc is going to be slow and it is going to be better to have a external hard drive. If you dont know what external means then it actually means that it is seperate from your pc or computer. Internal means it is inside the computer.