Slammer Systems
Slammer Systems is a company that makes a buzzer system called "Slam-in". The system uses individual wireless boxes for buzzers, activated by pressing a colored plate on the top (slamming the buzzer). The buzzers run using a computer and special software that also runs the match (timers, scoring, recognition, etc.).
The software also allows for livestreaming the scoreboard during the game, as well as remote competition.
Slam-in systems are used for the IESA state series, the Commissioner's Academic Challenge, and, before it went defunct, NTAE.
Drawbacks
The slam-in system does not meet NAQT's Lockout System Discount Policy, as the buzzers are wireless. Additionally, the default configuration requires a computer (although a console box is available as an add-on to allow for computer-free operation).