DOCUMENT SEC SYS INC

CUSIP: 25614T101 Class: CMN

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

Note: Option positions (PUT/CALL) are excluded.

Q2 2014
Shares 23,112 Value ($000) $32 Avg Close — Range —
Q1 2014
Shares 23,112 Value ($000) $30 Avg Close — Range —
Q2 2013
Shares 44,153 Value ($000) $102 Avg Close — Range —