If you have a lot of tasks to do, you will certainly appreciate your short-term memory - this way you can remember things you need for the tasks you are currently doing. A computer or notebook is no different - running programs and processes require a large amount of data extremely quickly. The main memory, often also called RAM, is the short-term memory of a computer. The more programs you use, the more RAM is needed. If memory runs low, processes will stall - the computer jerks and takes longer. As a human being you would have to think for a while before you can continue working. Fortunately, you can help your computer - RAM can be upgraded quickly, easily and cheaply on most devices. So extending your RAM is often the easiest way to give your computer or notebook a performance boost.