Its on my character sheet under 'Matrix Gear.' Its from Unwired.
Optimization (Rating)
Program Types: Common, Hacking, Autosoft, Simsense
Under normal circumstances, a node’s System rating limits the rating on any software run on that node (see System, p. 213, SR4). A program with the Optimization option is more effective at running on a system with limited resources. Add the Optimization rating to the rating of the System (to a maximum of twice the System’s rating) to determine the maximum rating at which the program can operate.
I have Optimization (Analyze) on my commlink.