"Technical canvasses involve canvasses for electronic devices in order to identify witnesses and sources of information. Technical canvasses may involve electronic image capture devices (still, video, CCTV), electronic banking transaction devices (Automated Teller Machine), electronic financial transaction devices (credit card, debit card, social services card, stored value card), electronic travel transaction devices(Metro Card, EZ Pass, airline ticket, railroad ticket), electronic access/egress control devices (identification card reader, proximity card reader, biometric card reader), cell sites, pay phones, internet cafes". (FEMA, IIFOG Version 3 Draft, Feb 2008, 40)