Memory Type: SDRAM, PC133, SDRAM (non-ECC)
Maximum Memory: 1GB
Slots: 2
Each memory slot can hold SDRAM, PC133 with a maximum of 512MB per slot.*
*Not to exceed manufacturer supported memory.

If the model number on the notebook indicates it is a BR10 then you have a SDRAM based notebook. If that model number indicates it is a BR20 you have a DDR based notebook.

How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. More information about OS memory maximums can be found here.

Memory or DRAM is the 'working' memory of the computer. It's used to store data for programs (sequences of instructions) on a temporary basis.

video - installing memory