One of the country's largest voting machine makers has admitted in a letter to a U.S. senator that some of its past election-management systems had remote-access software preinstalled, despite past denials that any of its systems were equipped with such software. Election Systems and Software (ES&S) told Democratic Senator Ron Wyden ... that the company provided election equipment with remote connection software to an unspecified number of states from 2000 to 2006. "ES&S provided pcAnywhere remote connection software on the [Election-Management System] workstation to a small number of customers between 2000 and 2006," wrote Tom Burt, ES&S president. The election-management system is used to count official election results and sometimes to program voting machines. PcAnywhere was the name of the remote-access software made by Symantec. In 2012, Symantec told all of its customers to disable or to uninstall the software after admitting it had been hacked in 2006, at the same time that ES&S was selling election-management systems with pcAnywhere preinstalled. ES&S would not say how many systems were sold with the software from 2000 to 2006 but stressed the company stopped using it in 2007, after it was prohibited by the Election Assistance Commission. A computer science professor at Carnegie Mellon University discovered in 2011 that the technology was pre-installed on an election-management system that was sold to a Pennsylvania county.