Operating System: The program used to issue the commands that run the computer. Common operating systems in use today are Windows Mobile and Palm OS.
Installed Memory: Usually used in reference to the system RAM (Random Access Memory). RAM comes in the form of chips and is used to temporarily store information. It can be written to and read from, and is measured in Megabytes (MB) or Gigabytes (GB). 1 GB = 1024 MB.
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