There are several companies that manufacture and sell voting machines, including Dominion Voting Systems, Election Systems and Software (ES&S), Hart InterCivic, and Smartmatic. These companies provide different types of voting machines, including touchscreen machines, optical scan machines, and ballot marking devices. However, the specific type and brand of voting machines used in an election can vary depending on the location and jurisdiction. Election officials typically work with vendors to select and purchase the appropriate voting machines for their locality, taking factors such as cost, usability, and security into consideration.
Like any electronic device, voting machines can be targeted by hackers looking to manipulate election results for their own gain. There have been several instances of voting machines being hacked or malfunctioning in recent years, raising concerns about the security and reliability of electronic voting systems. It is important for election officials to ensure that voting machines are properly secured and tested before each election to prevent any potential issues.