How do I find out who makes my laptop memory?

Installing new RAM is the very easy thing in the hardware part. Without opening ur laptop in ur laptop u couldnt find the model and make of ur RAM. It is easy to remove the two screws. and finally take the RAm out and insert the new ram. If is in 2 diff brand it doesnt matter.But it should be in same series...like DDR2 6300 or DDR 5300 or DDR4200 like that.