Mnemonic

Mnemonic gives you +3 Memory.

Mnemonic is a talent.

Overview

Mnemonic grants 3 additional Memory slots, allowing the character to equip more skills simultaneously.

Mnemonic is most useful for characters who draw from multiple skill schools and need more equipped skills than their base Memory allows. The 3 extra slots are equivalent to investing 3 points in the Memory attribute.
The talent is a convenience pick rather than a power increase – it frees attribute points from Memory to be invested in damage stats, but the net effect is smaller than simply taking an offensive talent.
Most experienced players find they can manage skill slots with careful Memory investment and do not need Mnemonic.