Expand the HP LaserJet III and HP LaserJet IIID series printer's standard memory up to an additional 4 MB through installation of the HP 33474B one-megabyte (MB) or HP 33475B 2 MB RAM memory board. There are two available memory expansion slots. Any combination of 1 MB or 2 MB boards can be installed. 4 MB is the maximum expanded memory that the printer can use.

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