Random Access Memory (RAM) provides space for your computer to read and write data to be accessed by the CPU (central processing unit). When people refer to a computer's memory, they usually mean its RAM.
SODIMM memory is also available for laptops and come in DDR1, 2 and 3 variants. Most laptop will have 1 or 2 slots for memory meaning you can put 2 ram sticks in at the same time, while desktop computers generally have 4 slots.
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