The first A was a code for a cap manufacturer, the 2nd A was code for 1.0 and the 5 was the power of 10 to multiply the 2nd A. This cap "AA5" is 1.0 x 10^5 pF, or 0,1uF. For some reason surface mount device makers quit labeling capacitors, though they still mark the resistors.
http://www.wa2ise.com/AA5smd.jpg