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I believe that with the new salt and pepper shakers, the salt shaker is the one with 3 holes, while the pepper goes in the one with 2 holes. Salt is used more than pepper anyway. Pepper should only ever be fresh ground at the table, meaning salt shakers win out.
Two types of DIMMs: a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom). The SDRAM module has two notches (rectangular cuts or incisions) on the bottom edge, while the DDR1 SDRAM module has only one. Also, each module has eight RAM chips, but the lower one has an unoccupied space for the ninth chip.