If e-voting is currently being used, what type(s) of technology used? - United States

Country: 
United States
Question: 
If e-voting is currently being used, what type(s) of technology used?
Answer: 
Direct recording electronic (DRE) voting machines with and without voter-verified paper audit trail (VVPAT) Optical Mark Recognition (OMR) or Optical Character Recognition (OCR) Some states allow overseas and military voter to send ballots electronically.
Comments: 

Electronic systems include a broad range of DREsystems, such as those that use touch screens and/or keyboards to record votes.  In addition, voting systems that use electronicballots and transmit official vote data from the polling place to anotherlocation over a public network are now designated as Public Network DRE VotingSystems. Some paper-based systems encompass both punchcards andoptically scanned ballots. It needs to be noted that 32 states allow military and overseas voters to return ballots electronically. 

Source: 
http://www.fec.gov/agenda/agendas2001/mtgdoc01-62/overview.htm

https://www.verifiedvoting.org/resources/internet-voting/